Magnetospeed

[6ShotsOr5?]

I advocate for not using a chronograph for load development at all. Only use it at the end to verify speed and then put it away.

Me too! Let the target tell the tale

Me too, too.

I have a pic rail adapter for my MS which only works on 2 ARs because none of my other rifles have rails that are long enough. The newest one for me is thatbIm strapping the MS bayo to a can which I use on several different rifles so the setup for the MS isn’t changing other than the sensitivity due to bullet sizes.

 

[snakepit]

A couple of years ago I was checking load velocities with my MagnetoSpeed. After shooting my last 4 round group with the MagnetoSpeed installed I decided to shoot my remaining 4 rounds with it not installed on the barrel. I was shooting at 600 yards with my 6mmBR/1.25"x30" Brux Barrel. The load was 30.5 gr of Varget, Berger 105 Hybrids jumped .025 and CCI 450's. I measured the target on my computer using the On Target Precision Calculator Target 2.1 Program. The 4 shot group without the MagnetoSpeed installed measured 1.346" wide by .540" high. The 4 shot group with the MagnetoSpeed installed measured 1.390" wide by .506" high. The group with the MagnetoSpeed installed measured 4.281" down and 1.291" left center to center from the group without the MagnetoSpeed installed. Again this was at 600 yards. I can't tell you why the POI was down and left.
I published this on other MagnetoSpeed threads and I am continually told that this is not statistically significant because I did not have enough groups and rounds per group and will probably be told this again and they may be right but I did this more out of curiosity than trying to make a factual statement to prove a point. I only use my MagnetoSpeed to check velocities at the end of load development and I have only used it one time to check a group for POI shift comparing the MagnetoSpeed on and off the rifle at the same testing session.

 

[338 dude]

I wish to give Scott Satterlee's 10 shot load development a try and already have a Cawldwell Presision premium chronograph and although I have enjoyed very good success with it shooting rifles and compound bows through it, admittedly it has been some what limited in use of under 100 rifle rounds so far not enough to IMHO prove it as highly reliable.To date with my limited use I had no issues getting consistent results and the free smart phone app is great.

I was considering selling it as I can easily get $110 for my unit and put it towards a Magnetospeed Sport model for $149-$159. I have been researching both the pros and cons of the Magnetospeed and the Caldwell chrono systems and are concerned about the Magnetospeed's added weight on my barrel giving me problems that might seriously affect my velocity based load development rendering it unusable.

Unless the several dozen reviews I read were all wrong, it seams to be well documented that the MS system will almost certainly affect your groups POI, usually high, but will the MS system have a large enough impact on my velocities that i can not use it for the Scott Satterlee load development system?

The SC LDS as most know looks for a velocity based accuracy node in a 10 shot string of loadings varying .2 grains of powder from max going down. So if I'm understand the Scott Satterlee's system you are only looking for a velocity plateau where the velocity evens out and at this point pay no attention to group size, you can but at this point it's not necessary.

Lastly I'm just beginning my journey into longer range shooting and are on a limited budget, and I belong to a private range and setting up and adjusting my Caldwell is never an issue and if i need i habve a awesome 10'x10' pop up canopy that i can set up in 10 minuets that I can use to shade my Caldwell if sunlight gets to be to much, and please don't suggest the Labradar as no way can i justify let alone afford it.

So is the Magnetospeed 100% compatable with the Scott Satterlee 10 shot load development system? or should I just stay with my Caldwell?
Thanks,
Art.

I have had magneto speed V3 and sporter they are great machines I like them better than lab radar due to the price obviously and never miss a shot unlike the lab radar which I have used several they are very finicky to get set up and miss rounds a lot they do affect point of impact however you can solve all those problems by getting what I have here from wiser precision

 

[hunter67]

I use the MS for velocity after load development is done for two reason. 1 I get velocity for trajectory 2 when I change powder lots I immediately chrono new powder to get it to same velocity as old load.

 

[Clark]

I have the magnospeed, used it once years ago, and it is still on that rifle.

I am back to the prochrono for the 3 or 4 rifles I build in September and shoot in October each year.

I am not going to waste my time with the magnospeed interface, and I am an electrical engineer.

 

[Bbear]

I say go ahead and get the MS. It should be more accurate on the recording of your velocities when you're doing the 10-shot method. But, when you DO find that 'node', take the MS off to check your groups.
In my experience, the 10-shot method doesn't work for EVERY cartridge/rifle combination, but it works often enough to give it a try.

 

[D-4297]

I have a V-3 ; and it doesn't go anywhere near the rifle until I've completed all of my "on-target" testing . Ladders , seating , etc. Then like others , I get velocity readings off of ten shot strings , for powder lot comparison , and being able to re-tune the load when I have to change to another lot of powder . After I have a consistent load that works ! Velocity is irrelevant , until the grouping has been established . People chase velocity like it's some mystical god , and waste rounds , burn up barrels , bullets and powder in seeking the "Velocity God" . Work the target . Then find out what the velocity is that's working .

 

[BartsBullets]

No more poi changes.

Very Nice!

 

[dcali]

The magnetospeed was great when it came out for two reasons: it’s very accurate, and you don’t need to go down range to set it up.

Unfortunately, you cannot develop loads with it on. That means you have to shoot throwaway rounds to get a reasonable amount of confidence in your velocity. Say it’s 10 shots. Well that’s $5-10,give or take, in bullets powder and barrels. More for some calibers.

Then the labradar came out. And honestly, it makes the magnetospeed obsolete for most users. You get data on *every* shot you fire for zero extra cost. In the long run, the labradar will give you more data and cost you less than a magnetospeed.

If the Caldwell meets your needs and a labradar is too pricey, stick with the Caldwell. If a new one is in the cards, save up and get the labradar. You'll come out ahead and get more use out of it.

 

[B23]

Not sure why you say you can't develop loads with the MS bayo attached, I do it all the time. Yes, the bayo can change POI, so does a muzzle brake or suppressor, generally they change POI a lot more than a MS bayo, but I've never had any of them affect group size. I leave the bayo on all the way through load development, once I get a load that groups well I take it off, readjust POI to where I want it and shoot a small group to confirm it still groups well. I've yet to have the groups not repeat with the bayo off, versus on.

Another way would be to use one of the stock mounted bayo attaching systems and you won't have to be concerned with POI change at all and you will have the benefit of very easy setup with no issue of dropped/unrecorded shots the MS always provides.

 

[piie]

Not sure why you say you can't develop loads with the MS bayo attached, I do it all the time. Yes, the bayo can change POI, so does a muzzle brake or suppressor, generally they change POI a lot more than a MS bayo, but I've never had any of them affect group size. I leave the bayo on all the way through load development, once I get a load that groups well I take it off, readjust POI to where I want it and shoot a small group to confirm it still groups well. I've yet to have the groups not repeat with the bayo off, versus on.

Another way would be to use one of the stock mounted bayo attaching systems and you won't have to be concerned with POI change at all and you will have the benefit of very easy setup with no issue of dropped/unrecorded shots the MS always provides.

Of course everyone's milage will and do vary; even with myself - the Magnetospeed can and will affect group sizes on specific weapons. My case in point - when I used it on my 6.5 creed with bull barrel, I hardly notice ANY change in either POI or group size, but when I fix it to my hunting rifle, the POI is shifted by almost 6 MOA, and the group sizes open up more than 2x. I was convinced there was something wrong with the rifle - had it re-bedded and re-crowned. Then I got a good deal on a labradar, and immediately I noticed huge improvements with the same loads that previously gave me very bad results on paper.

 

[338 dude]

Not sure why you say you can't develop loads with the MS bayo attached, I do it all the time. Yes, the bayo can change POI, so does a muzzle brake or suppressor, generally they change POI a lot more than a MS bayo, but I've never had any of them affect group size. I leave the bayo on all the way through load development, once I get a load that groups well I take it off, readjust POI to where I want it and shoot a small group to confirm it still groups well. I've yet to have the groups not repeat with the bayo off, versus on.

Another way would be to use one of the stock mounted bayo attaching systems and you won't have to be concerned with POI change at all and you will have the benefit of very easy setup with no issue of dropped/unrecorded shots the MS always provides.

I agree 100% I recently purchased this mount from wiser precision Its carbon fiber and fairly cheap Also without it touching the barrel at all I can leave it on for all my rounds and all load development and get a much better idea of what is really happening with my ammo