MagnetoSpeed, How well do they work?

[Raythemanroe]

I was wondering how the MagnetoSpeed works with a muzzle brake? Has anyone compared results working up loads to a standard Chrono? Does the change in barrel harmonics inherently mess with the end result?







Ray

 

[dkhunt14]

Re: Magnrtospeed, How well do they work?

I used a buddy's on my 338 Lapua IMP with a brake and shot really good at 1000. But that is a 1.450 Diameter barrel in a block so I don't think it would mess as much with harmonics. The velocity reading were good ad consistent. Matt

 

[Raythemanroe]

Re: Magnrtospeed, How well do they work?

Thanks Matt, When you gonna do a review on that annealing machine?



Ray

 

[gotcha]

Re: Magnrtospeed, How well do they work?

Ray, No problems here shooting with multiple muzzle brakes. .257AI, 22-250, 6.5L Just position brake as shown in instructions. Have not compared to chrono but speeds are right on par with load development data from Manuals. My groups will shift slightly (1/8 th inch @ 100) but remain same size with and without brake mounted.

 

[Raythemanroe]

POI shit doesn't mean much to me, my interest is if the node would change with out it on the gun. The brake had me concerned because my gun barks a bit and the placement of the MagnetoSpeed didn't look promising.. I would guess If Matt has seen them work on a Ede or improved 338LM I should be okay..lol



Ray

 

[Erik Cortina]

POI shit doesn't mean much to me, my interest is if the node would change with out it on the gun. The brake had me concerned because my gun barks a bit and the placement of the MagnetoSpeed didn't look promising.. I would guess If Matt has seen them work on a Ede or improved 338LM I should be okay..lol



Ray

If it changes POI it means it is affecting barrel harmonics. I would not trust it as I'm sure node would change with it off as it would act like a tuner.

 

[Raythemanroe]

POI shit doesn't mean much to me, my interest is if the node would change with out it on the gun. The brake had me concerned because my gun barks a bit and the placement of the MagnetoSpeed didn't look promising.. I would guess If Matt has seen them work on a Ede or improved 338LM I should be okay..lol



Ray

If it changes POI it means it is affecting barrel harmonics. I would not trust it as I'm sure node would change with it off as it would act like a tuner.

What I'm afraid of, but it would be much more convenient..



Ray

 

[James EPS]

Ray,
I use one on alot of different rifles with and without brakes with great success. Its convenience and ease of use is a great for tuning and testing. I also use it with my suppressors. Not much downside if any in my experience.

James Eazor

 

[6BRinNZ]

As far as I can tell there is little to no hard data out there clarifying impact on tune. There are two theories that relate to POI change 1./ deflection by gases over the baynet 2./ EMF deflection on the bullet.

The theory that it would affect tune is grounded in common sense. I do think the impact on tune is probably going to be relative to the level that you are tuned to. If everything is in one hole then small changes will impact this, if you are shooting half moa at 100 it could be worth considering.

I don't do load development with one strapped on because I subscribe to the theory that it will impact tune to some degree (Although I have no hard data to support) but I do use it on club days to verify ES/SD numbers during club days under match conditions and over different seasons to validate temp stability etc.

I can say that I developed loads in my 6br without one and subsequently used it in club days out to 900 yards. I could hold the 10 ring fine and I would always have to crank down 1 moa.

For me it has a place in my tool kit just not when I am tuning.

 

[Raythemanroe]

Ray,
I use one on alot of different rifles with and without brakes with great success. Its convenience and ease of use is a great for tuning and testing. I also use it with my suppressors. Not much downside if any in my experience.

James Eazor

Have you worked up loads with it and done the same with a standard Chrono?



Ray

 

[savageshooter86]

This keeps coming up again and again. If someone that knows how to shoot well and work good loads up would test this and post then we would have a better idea if it would or would not cause nodes to shift

 

[bluto77]

It causes my nodes and POI to shift. Velocity measurements are the same as on my buddy's Ohler. I don't use it when testing accuracy. I only use it to measure velocity. Example: Shooting a custom 308 on 20" Broughton barrel, 10tw, M24 contour, at 300 yards with 185 Jugs, my group with the MS strapped to barrel was about 1.8" and POI was ~ 4" higher than w/o MS (10 other groups w/o). Comparing the same charge w/o, my group was .387". All other groups were 1.5" or less at other charges w/o MS.

 

[swampshooter]

Wanting to upgrade from my Chrony, I bought one and sent it back due to poi changes. I wound up with the new Oehler, model 35 I think, I'm very pleased with it.
I like the fact that it measures velocity of every shot twice. If both readings don't agree then you know that there is an error.

 

[Dgd6mm]

It causes my nodes and POI to shift. Velocity measurements are the same as on my buddy's Ohler. I don't use it when testing accuracy. I only use it to measure velocity. Example: Shooting a custom 308 on 20" Broughton barrel, 10tw, M24 contour, at 300 yards with 185 Jugs, my group with the MS strapped to barrel was about 1.8" and POI was ~ 4" higher than w/o MS (10 other groups w/o). Comparing the same charge w/o, my group was .387". All other groups were 1.5" or less at other charges w/o MS.

This is my thought exactly.

 

[Bert]

I love the Magnetospeed I have. Have used on 6br up to .338 lapua with breaks and cans. Works great to collect speed. I do not like it for load development due to impact shift. I still like the ohler for load development. Nice part with the mag is it works in the dark, rain snow you name it. Easy to setup. I like to collect my speed at different temps and it is great for that due to quick and easy to setup.

 

[Rustystud]

I own 5 chronographs and my Magneto Speed has become my go to chronograph. There customer service was exceptional also.
Nat Lambeth

 

[fdshuster]

Lightning fast setup and "takedown". 2 minutes after I take it out of the carry/storage box, ( a small one handgun "GunGuard") I fired the first shot. Works all the time, every time in any and all light conditions, never have to make the range safe to step in front of the firing line, no danger of ever hitting anything, less than 2 minutes after removing the bayonet, it's packed away in the same small box.

Yes, I get a very small shift in the P.O.I., at 100 yards, about 1/2" high, but that can be an advantage since you are not shooting at your aiming point. Have never seen any real difference in group sizes with the ppc's, BR's, etc. It has recorded each and every shot fired across it, since I bought it new, 2 years ago last June.

Tried the upgrade strap from the VH-2 with the tightening knob, but prefer the original over-center clamp of the VH-1.

 

[Dgd6mm]

I just scored a heck of a deal on one yesterday. Dave Berg offered his up to another member that purchased one in the meantime. I sent Dave an e-mail that I would like to buy it if it was pasted up. I can't wait to get it, I've seen them used and I think they are great for an all around use chrono.

 

[hogpatrol]

POI shit doesn't mean much to me, my interest is if the node would change with out it on the gun. The brake had me concerned because my gun barks a bit and the placement of the MagnetoSpeed didn't look promising.. I would guess If Matt has seen them work on a Ede or improved 338LM I should be okay..lol



Ray

If it changes POI it means it is affecting barrel harmonics. I would not trust it as I'm sure node would change with it off as it would act like a tuner.

Can't find it but I saw somewhere on the web where it was postulated that an aerodynamic effect as the bullet passed over the bayonet was the cause of the POI being higher. When I get time over the winter, I'll make a fixture to hold it so it isn't touching the barrel and see if I can verify that theory. Expanding on your hypothesis though, does a mirage shield also affect harmonics?

 

[snakepit]

Here is a test that I did and posted back in May, 2013 in another MagnetoSpeed thread on this site.

I did a comparison with my 6mm BR/30" barrel with and without the MagnetoSpeed model V2 installed. I tested at 600 yds with a calm to light right to left crosswind and some very light mirage. All in all the conditions were pretty good. When I returned home I measured the groups on my computer using the On Target Precision Calculator Target 2.1 Program. The first 4 shot group without the MagnetoSpeed measured 1.346" wide by .540 " tall and the second 4 shot group with the MagnetoSpeed installed measured 1.390" wide by .506" tall. The group with the MagnetoSpeed was 4.281" down and 1.291" left center to center from the group without it installed. Again, these results were at 600 yds. For me it does not seem to affect the group size very much just the group displacement which I can correct with resetting the scope. I normally only use the MagnetoSpeed in load testing to get my velocity.