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March scope review

Turbulent Turtle

F-TR competitor
Introduction:
In this review, I will discuss my reasons for selecting a March scope to replace my existing Nightforce NXS on my F-TR rig and then go through a review and findings followed by my conclusions.

Background:
This shooter is 60 years old and has been wearing glasses in excess of 47 years and bifocals for almost 20 years. I am a software engineer by training and trade (40 years) who spends most of his days looking at computer screens. I started programming using cards and an IBM 026 keypunch machine in the mid-70s and moved on to an HP2645 CRT in 1977, green screen 24X80. My current setup at my home/office involves a 4K display connected to my high-end laptop. I’ve been an avid photographer all my life and currently use a Nikon 5200 for which I have multiple lenses. I’ve been around optics and lenses forever and I know about f-ratio, filters, resolution, apertures, depth of field, etc. and the various trade-offs inherent in optical lenses.

I have been using a Nightforce NXS for a couple of years and while I think it’s a great scope, my aging (and optics-savvy) eyes have been desiring something better for the early morning winter matches and the heavily overcast days as well as better definition of the rings at maximum magnification.

Existing setup.
About 3 years ago, I bought a Nightforce NXS 12-42X56 with the NP2DD reticle and 1/8 MOA dials and installed on it my then F-TR rifle while waiting for my current F-TR rifle parts. The NXS has a 30mm tube and a range of about 45MOA for elevation. This indicated to me that the internal lenses are bigger than the ones used in a 1 inch riflescope; in other words Nightforce, to their credit, had taken optical advantage of the 30mm tube instead of the marketing advantage by eschewing the 80MOA range they would get using smaller internal lenses. More on this in a bit.

The 56mm objective lens does a great job of letting in a lot of light and the bigger internal lenses have a correspondingly bigger sweet spot and thus better resolution and a higher f-ratio which makes the image appear brighter or clearer. However, I was somewhat disappointed by the fact the image appeared dark and grainy when I was using 42X magnification in times other than midday bright sunshine. However, most of the time I shoot at high magnification, it’s not really dark outside after spring has sprung and then turned into summer. If there’s one thing we have a lot of in Houston during summertime, it’s sunshine.

I just turn down the magnification when it’s darker outside and everything is brigther but smaller. Trade-offs.

Defining the “problems”.
In Highpower competition, our targets are black on tan and the reticles in the scopes are invariably black. Sometimes it is difficult for me to see the fine black dot of the NP2DD reticle on the aiming black of the target, especially in the early morning matches. I have taken to turning on the illumination for the reticle, but on the NXS the adjustment of this illumination is primitive at best and so it was not a complete solution.

The rings were a little fuzzy at 42X even after adjusting the side focus as best I could. My impression was that I was experiencing the limits of the glass and running into chromatic aberration whereby the glass was not able to focus the tan rings and the aiming black background onto the same convergence points. To my eyes, it looked like color fringing; the rings were just not as sharp as I had hoped they would be. Of course, atmospheric disturbances (mirage) just made things worse but that would come later in the day.

Thinking about solutions.
ED glass, or Extra-low Dispersion glass, is designed to reduce or eliminate chromatic aberration in lenses by reducing the dispersion of the various wavelengths, or focusing them better as a group at the same place, if I can use some layman terms to explain. In theory, repeat, in theory, using ED glass “should” produce a sharper image of the target rings to my eyes at high magnification and “may” even reduce the fuzziness of the rings in mirage conditions.

For a while now, I have speculated that über-expensive spotting scopes actually minimized the effects of mirage due to the ED glass they use and that perhaps that was not “a good thing” when trying to read the conditions. On the other hand, this would be “a good thing” for riflescopes on F-class rifles when you can use a separate spotting scope to read these conditions.

So, if I were to replace my NXS for something better, it would have to have high quality ED glass. But what about the other issue, the reduced “brightness” of the image at dawn and on overcast days?

The amount of light that enters an optical riflescope is dictated by the size of the objective, period. A riflescope does not “gather” light or “suck in” light, it’s passive and light gets into it according to the size of the objective lens. We talk about the size of the exit pupil as a factor of objective lens diameter divided by the magnification. If I wanted to stay at 42X or thereabouts, I wanted to have at least a 56mm objective; not a smaller one. Bigger than 56mm would be nice, but those are rare and it starts to get very big on the rifle.

Once the light enters the optical riflescope, it will only get reduced, never amplified. The main thing that reduces the amount of light is the air/glass boundary. When light goes from one medium to another, various wavelengths are affected differently and some bounce off the boundary more than others. In uncoated lenses, each air/glass boundary takes away about 5% of the light that is going through the riflescope. When you have a fixed power scope, that’s not too bad as there are only a few lenses but 5% at every boundary still adds up. In a variable scope, the addition of the zoom lenses increased the number of boundaries and the amount of light lost.

Enter coating, the technology that uses an ultra-thin film of material on the surface of the lens that counters, or at least reduces the effect that robs a portion of the light at the air/glass boundary. Various coatings work for different wavelengths and a top quality glass will be “multi-coated” rather than just “coated” to handle all the wavelengths, thus producing a higher color fidelity image to the eye. You also want to have the coating on both sides of the lenses so you look for the word “fully” in the description. So “fully multi-coated” is where it’s at. There are other coatings available to do other things such as scratch resistance and moisture repellence and so on. And of course, companies tout their coating methods over others.

So when we talk about light “transmission” through the riflescope, fully multi-coated lenses can produce a light transmittance factor of 92% or 95% or thereabouts instead of the 70% left over going through uncoated glass. 95% is about the best that can be attained now and there are differences in this between day time and night time. I had read somewhere that the NXS had an 88% light transmission factor in daylight. Not very good, but not too bad.

The f-ratio (maximum aperture) is the relationship between lens diameter and focal length. In camera lenses this f-ratio is written on the lens like “1:1.8” or “1:3.2” or some such. The closer to 1 that second number is the “faster” the lens is or the more light goes through the lens to the sensor or film plane. As magnification increases that f-ratio number will also increase and the image gets dimmer. In camera lenses you can also control the amount of light that goes through the lens by using something called the aperture, essentially it’s a plane with a hole of varying size in the lens. The size of the hole is indicated in f-stops and the smaller the hole, the greater the value of the f-stop. The f-stop will range from the stated f-ratio (maximum aperture) down to something like f/16 in regular lenses and f/22 or f/32 in higher magnification lenses. Blah, blah, blah.

Higher magnification lenses have an f-ratio (maximum aperture) that is pretty low, like f/3.5 or f/4.5 and f/5.6 and so on. As we all know, zooming out a camera in low light results in darker pictures or blurrier pictures due to slower shutter speeds. But we see sports photographers with genormous zoom lenses taking pictures that come out incredibly sharp. They have what we call, “fast lenses.” Lenses with an f-ratio of f/2.8 or some such and at higher magnifications. These camera lenses are in the multi-kilobuck range(1) and they sport bigger internal lenses to go with their enormous objective lenses. You see, doubling the diameter of a lens halves the f-ratio number of said lens. And this last bit is important.

In order to increase the diameter of the lens and benefit from the smaller f-ratio you must have a bigger diameter tube. The regular tube that we are familiar with is a 1inch (25.2mm) tube. The next bigger one is the 30mm tube (I’m ignoring the rare 26mm tube here,) and that represents a 20% increase in diameter. Riflescope makers have a choice when going from 25.2 to 30mm tubes. They can increase the diameter of the internal lenses and give the same range of elevation that one has in a 1inch scope, or they can keep the same internal lenses as the one inch scope and double or more the adjustment range. You can’t have both. Trade-offs again. If your 30mm riflescope has 80MOA+ of adjustments, the internal lenses are the size of the ones in one inch scopes. The NXS has 45MOA of adjustment, suggesting it has bigger internal lenses than 1 inch scopes.

The next step up in tube diameter is 34mm. The same choice presents itself. I wanted to have bigger internal lenses than what was in my NXS, so I wanted a 34mm tube with a range of adjustment around 50MOA total.

As for magnification, I thought the 42X of the NXS was fine, I never really desired for much more as it just reduces my field of view and could cause crossfires. Also, when it was bright outside, the mirage would be out in force and higher magnification would not help.

So in order of importance; top end magnification of at least 40-50X range but no need for much more, 56mm minimum for objective lens, ED glass and 34mm tube with proper adjustment range. Of course it would have to be no heavier than the piggish NXS at 32 ounces.

Essentially, there were very few scopes that met one or more of these parameters. I briefly considered the NF Competition, but with a 52mm objective AND a 30mm tube, it would not provide the additional benefits that I needed to have to justify a change. The new Leupold VX-6 7-42X56 seemed to fit the stipulated requirements, as does the Schmidt and Bender 12X50-56 PM II/P. The latter was eliminated because of its weight of 1.110 kilo, even more than the current NXS.

Back in the fall of 2014, I invited Jim Kelbly and his road show to the Bayou Rifles range and he showed up on a Sunday when we were holding a 600yard match and allowed shooters to look through a plethora of March scopes, at their own range.

A few month later I started a conversation with Jim about a scope and we discussed some of my requirements and he pointed me to the March –X with the 34mm tube.

So the decision was between the Leupold VX-6 and the March-X. In the end, I opted for the 20% or so increase in top end magnification and to me, the illuminated MTR-2 reticle of the March-X was preferable as compared to the TMOA reticle of the Leupold VX-6. Also if the Leupold uses ED glass, they are keeping it a secret.

Installing the March-X.
I received the March-X at the end of last year along with a set of Kelbly’s excellent 34mm rings and installed the scope on my rifle last week. Before you ask, I did not lap the rings. I set the rings on a flat surface and placed the scope in the rings turning the screws very loosely in a position that would place the eyepiece very close to the existing one. I set the magnification at 40X, to match what I would see with the NXS at its maximum magnification. Then I set up my F-TR rifle without its bolt on its Sinclair 3rd gen bipod and placed it in the Seb rear bag and pounded it in. I locked everything level on the bipod and made sure nothing moved. I focused and aimed the scope at very specific spot on an object across the way. Next I loosened the screws holding the rings to the dovetail mount and slowly slipped the NXS out still in its rings, making sure not to disturb anything.

I slipped the March-X scope in its new 34mm rings on the dovetail, making sure nothing moved. I tightened the screws holding the rings to the dovetail but only finger tight and looked through the scope. The vertical line was nearly the same but the elevation was off, as I expected. I dialed the elevation until the reticle was very near or at the same spot as before on the object. Then I carefully removed the scope and replaced the NXS and confirmed that the rifle had not moved at all. I swapped the scopes again and this time tightened the main screws to the torque specified in the manual. I adjusted the scope so the dot would be right at the same spot as before, confirmed the reticle was level with my levels and tightened the ring screws to 12 in-lbs as per the instructions. I figured I would be close enough at 1000 yards that I should be able to be on paper rapidly and go from there.

First match with the March-X
This past weekend, I shot a match with the scope for the first time. During setup I noticed that looking through the scope at 40X, it was much brighter than what I remembered with the NXS and it was early in the morning a week after the longest night of the year, winter solstice. And it was heavily overcast to boot. These where the exact conditions that had prompted me to look for something better than my NXS. With the March-X, I had no problems seeing the target and the image was clear and bright, almost like it was midday on a bright summer day.

The rings were razor sharp and the reticle stood out nicely from the black target. I played with the illumination and it was exactly what I needed at its lowest setting (it has 4 settings, by just pressing a button.) I knew then that I had accomplished what I had set out to do. Now I had to worry about getting on target and getting a zero, at least for elevation.

The first shot was low and right, I actually saw the splash in the protective berm and I was in the black, in the 9 ring by the third shot. The wind was howling from the front left and that’s what had help pushed me off the target and the 35 degrees temperature with that frontal wind made the bullets slower than usual. Also the method of mounting the scope was really a kludge but it was the best I could do in the timeframe I had. All in all, it turned out fine.

Since there was no mirage, I increased the magnification to its maximum of 50X and was surprised at how bright and crisp the 24% bigger target looked. I had no problem setting finding a proper cheekweld. The scope was essentially in the same position as its predecessor and the eye relief was similar enough. I might refine it a bit in time, or I may just use it as is.

One of the complaints I’ve had with the NXS was fighting with the magnification ring. No such complaint with the March; the magnification ring works just fine and has the proper amount of resistance so that I can change it from position. The side-focus was the same way and it was easy to adjust, but not so easy that it would change just touching it.

I played with the elevation and windage knobs and while I liked the feel of these knobs on the NXS, I also like the feel of the ones on the March-X even though it’s a different feel. Both are positive clicks and easy to count or just get a single click.

I spent more time looking through the scope than actually shooting, the image was so good. I just could not get over it how good it was. I could hardly believe the difference in clarity and brightness. In retrospect, I had done my homework and the scope I selected lived up to its specs.

The reticle is reminiscent of the NP2DD but it is a little different in that it has hash marks. I found myself using these marks to center the hold when I was holding dead-center. These should come in handy when holding off paper on in the “white”. I will find out over time.

It will be a few more months before mirage really comes into play, and I look forward to seeing how the ED glass performs and if it actually makes a difference. Any improvement there would be a bonus at this point.

Conclusion
A need for something better than what I had was recognized and the parameters for meeting these needs were identified and defined to exact specifications. The search was not very long because these specs were so very precise and “extreme.” The first outing occurred in conditions that were the ones pushing me to look for something better. The results proved that the analysis and resolution were spot on. It’s nice when a plan comes together.

Would the Leupold VX-6 do as well? Most probably but I do enjoy the extra 20% magnification while the air is clear. And I definitely like the illuminated MTR-2 reticle even though I won’t be using the illumination much.

The NXS is an awesome scope and it has served me well for these three years. I’m hoping the March-X will be as faithful and be as dependable; only time will tell.



(1) At the Nikon website, for example, you can see a 400mm (FX format) telephoto lens with an f-ratio (maximum aperture) of f/2.8. This is incredibly fast for such magnification and the lens has an MSRP of $12,000 and it weighs 134 ounces (8 pounds, 6 ounces) and measures 6 inches in diameter and is 14 inches in length.
 

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EXCELLENT Denys! I appreciate this endeavor! I have been wondering about March scopes for some time now. When Kelbly was at Bayou Rifles, I looked thru them but the heat waves (mirage) was so intense I could not distinguish any real difference. Tax returns are soon to come and I may just have to see what I can do along the same lines as you. If you can see with better definition at long range, then with my "LASIK / Fixed" eyes, I should really be able to make use of the better glass. Thanks again for your excellent review!
 
You now know why some have more than one March Scope, you fall in love with the optics.

My favourite is the March-X 8-80x56, a close second is the March-X 5-50x56 and general purpose March 10-60x52mm. All nice glass and I still don't see any reason to buy a spotting scope.

A lot lighter than any Nightforce Scope I have had in the past.

Thanks for taking the time to write your review.
 
I just learned an awful lot about optics. Thank you very much for taking the time to write that review.
 
Thanks for all the kind words and thoughts. I've also had a few PM and email conversations about the review and let me add a few more thoughts.

Some people may think that going from 30mm to 34mm should not make that much difference in the size of the internal lenses. Let's consider that.

The size of the scope tube, 25.2, 30 and 34mm, are all outside diameter measurements.

This OD takes into account the thickness of the tube metal, twice. This thickness should be pretty similar for all sizes and let's stipulate it's 2 mm thick. So 4mm total. Then you need to account for the thickness of the inner tube, twice. Let's make that 1.5mm, so a total of 3. Then you need some room between the inner and outer tube to allow for adjustments. I'll guess 4mm total for about 45-50MOA of adjustment. I could calculate it but I would still need to make assumptions. I picked 4mm because I noticed that people who market 30mm with LOTS more adjustment range usually get double the range of the 1inch scope. So if the extra 4.8mm gives them half the range, then the full range should take 9.6 and that's an extra 4.8, but let's make it 4mm.

So far we have accounted for 4mm for the tube, 3mm for the inner tube and 4mm for the adjustment range, that's 11 so far, let's make it 12 for some slop.

In a 25.2mm scope, the inner lenses would have a diameter of 13mm. If we add 4.8mm for a 30mm tube with the same adjustment range, these inner lenses would be 18mm and the 34mm inner lenses would be 22mm.

So, from 13 to 18(46%increase) to 22mm(70% increase from 1 inch and 22% increase from 30mm).
 
Comparisons, even side my side, are highly subjective. To be worthwhile, you MUST compare the scopes the same day and time, at the same target and in the same positions. Anything else is worthless when you are talking about high quality scopes.

Even when Jim brought his roadshow with all the scopes, the only real thing we could see is whatever the scopes are pointed to at that time, and that's not mounted on a rifle with you in the prone position. His array allows you to compare his various scopes from the same position. You can verify that the image is very clear and you can experience 50X, 60X or 80X.

My NXS is a great scope, absolutely first class. My post specified my baseline (including my age as this is very important since as you age your eyes lose acuity especially in less than perfect conditions), explained what my "problems" where, how I reduced these problems to specifications and then did a selection based on these specs. Then I was able to utilize the new scope in the exact conditions that I was trying to address and it worked spectacularly.

It would have been foolish of me to go for a scope of that magnification but with a smaller objective lens than my baseline scope (from 56 to 52.) Somebody with younger eyes than mine would probably not even have the "issues" that I experienced with my NXS on dark mornings or heavily overcast conditions.

Let me also add that when we get into high end optics, being able to "see a difference" is extremely difficult and really not possible, especially when using them in good conditions.

I'm a systems guy and I that's what I did here; create and follow a system.
 
Now you know why I switched.
Next try shooting groups at one distance with short distance and long distance dial up. Remarkable they are the same size.
 
I don't see a comparison at all. That's comparing a precision made instrument (March), to a boat anchor (Nightforce) with lenses ;D
 
JRS said:
I don't see a comparison at all. That's comparing a precision made instrument (March), to a boat anchor (Nightforce) with lenses ;D

If that ain't a troll, I guess I've never seen one.
 
Kings X said:
Now you know why I switched.
Next try shooting groups at one distance with short distance and long distance dial up. Remarkable they are the same size.

Again, that is due to the increased size of the internal lenses. Bigger lenses have a bigger sweet spot so you will get less distortion at the same distance from dead center.
 
Denys, on paper you are correct about the objective lens size. But in actual use it is flat amazing what they are getting out of that thing. I had a March 10-60 prior. I have not looked through a X yet. If its better than the comp than it will be the best glass on the planet!
 
zfastmalibu said:
Denys, on paper you are correct about the objective lens size. But in actual use it is flat amazing what they are getting out of that thing. I had a March 10-60 prior. I have not looked through a X yet. If its better than the comp than it will be the best glass on the planet!

Respectfully, I think you are making the point that I brought up in a subsequent post on this thread. You are now speaking subjectively and that way lies madness and acrimony and other unpleasantness. As I said earlier, it is very difficult to compare high-end scopes, especially in good conditions. You would need expensive equipment to be able to do that reliably.

Please remember that one of my problems had to do with 60 year old eyes looking through a 42X scope in early morning, overcast conditions. Reducing the objective lens is NOT conducive to increased brightness in the scope system.

I specifically do not want to make it a comparison between this and that scope or the other. I reduced it to specs, explained the specs and what they are about and I just reported that the March did exactly what I expected it to do for me.
 
And, oh by the way, before someone asks. I have no plans to sell my NXS; it is an awesome scope and I'm going to put it on another rifle in a little while, after the March has been to a few more matches.
 
The Shilen Swap Meet will be on Feb 28th. The Kelbly's Caravan will be their. They will have a complete line of the March Scopes with them as well as allof their receivers.
 
Very well written piece of information, noteworthy is the manufacturer's stated amount of elevation in relation to the tube size. Have looked thru several March scopes at local club and all are of exceptional optical quality. Have a few NXS's and one NF Comp; the NF Comp has a better " look " but it 's not a March....
 

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