Magnetospeed ?

[savageshooter86]

From shooters who have tested these with load work, do the loads you find hold up after testing? I know this always gets brought up, but seems like from people "thinking or assuming" it affects loads.

I know it moves POI, but would it give you misleading results for testing groups

If I test loads/work loads with it on, then shoot after it is removed.

I'm debating buying one to aid in load development for ES/velocity numbers

 

[Preacher]

It may shift the group, but it will not change the load you have worked up........

 

[jr600yd]

I've had mine for a couple of years now. (The first model to come out) love it!!!! POI shift? Haven't noticed one on my F class rifles, maybe on a thin sporter barrel? Once you use one you'll never go back.

 

[DeltaBravo]

It changed the POI on my groups, but still shot a good group when I took the time to try and shoot one. I first found the load that really worked well, then chrono'd it with the new Sporter just to determine MV. I found that with 1-thou more neck tension, my ES and SD dropped a bit (30 to 20 ES and 12 to 9 SD). These numbers are fine for the VFS that I shoot.

If you get the sporter (all you really need IMHO) get the XFR doohickey and the app. Makes it a LOT easier to review the numbers.

Dennis

 

[skiutah02]

I've had one for about 1.5 years and absolutely love it. Have shot several thousand rounds over it. Developed loads for 10-15 different bullets, about 4 different calibers, 8-10 different barrels and 5-6 rifles.

I'm sad to say, that once again - "it depends". On my very first barrel (308) on a Savage 12 FTR, it did not move POI at all and did not effect groupings/load, so I thought it had no effect - initially.

Then one match at 1000, my load went he**, and I investigated why and figured out that having the MS attached led me to be just a little outside the charge window in that case.

In my experience, having the MS attached and observing no effect in POI or groups is the exception. For me, in nearly every other barrel/rifle, it moves POI (again, usually, but not always, up and left about 1MOA up, 0.5 MOA left.) and can effect group sizes. IN GENERAL, I've found that when you are looking for a ballpark powder charge, it will not effect group size enough to lead you completely in the wrong direction, BUT when you are trying to get from 0.5 MOA to under 0.3 MOA at 100 it HAS mattered. Surprisingly, I've seen it bring 0.3ish groups into 0.2 (or less) groups like a tuner more often than not. I would be REALLY interested to know what parameter to change in powder/primer/seating depth to mimic this....have thought about attaching it during matches more than once.

YMMV, Drew

 

[missed]

I shoot with it almost all the time. My POI is minimal with 1" barrels. I have not observed any other changes other than the minimal POI

 

[minnesotamulisha]

I'm in the same boat as Drew. I also have the Savage F T/R and didn't notice a POI change. It is the only rifle I've used it on, though.

 

[savageshooter86]

Thanks for replies so far.

I don't mind if POI changes slightly if any at all, just seeing if loads worked up with it on are true loads or if they change after it's taken off.

I think this might be what I buy. Since labradar seems like it won't ever be available

 

[M99]

I love the thing. After over 35 years using an Ohler, I'd never go back. The measured velocities on both the Ohler and the Magnetek are also within 1% of each other.

 

[rtpnc]

Are they acting as a barrel tuner?

I suppose most importantly - are they impacting determining OCW nodes, or only seeing some POI shift and mild group opening up?
In other words, an OCW workup shows least vertical stringing at X.Ygr of powder, with corresponding charges before and after with similar verticals.

Maybe the actual vertical dispersion is 3/4 MOA with the MS on, but is the node itself still valid once removed, even if the group size (and POI) may change slightly once removed?

 

[savageshooter86]

That is what this thread is about. From actual shooters who can validate one way or the other

 

[Lapua40X]

Are they acting as a barrel tuner?

I suppose most importantly - are they impacting determining OCW nodes, or only seeing some POI shift and mild group opening up?
In other words, an OCW workup shows least vertical stringing at X.Ygr of powder, with corresponding charges before and after with similar verticals.

Maybe the actual vertical dispersion is 3/4 MOA with the MS on, but is the node itself still valid once removed, even if the group size (and POI) may change slightly once removed?

Let me first say that I love my MagnetoSpeed chronographs. IMO, ain't nothin' better.

I think rtpnc has a valid question. If the POI on target moves vertically when the bayonet is attached but the group size remains consistent then one would assume that the node moved when the added weight was applied. Why, when the weight is removed, the corresponding change in node occurs but only the POI on target drops slightly while providing a relatively consistent group size is something you'd have to ask an engineer. All I know is that's how it works for me with both of my MagnetoSpeed Chronographs and I love 'em passionately. The only time my MS Chrono has failed me is when I've done something stupid in the setup or forgot to engage the "start" switch. I only use my chrono after I've got an accurate load; to determine the MV. If I used the alternative method of obtaining a certain MV and then adjusting the load to reduce group size I'd still leave the chrono off of the rifle in those final stages.

 

[JamesnTN]

I'm not sure what distances the guys noted they are testing the MS with and only a POI change. My results show differently at 500 yards with the MS on and off. I can't attest to POI change because I dialed my scope for a different impact to verify differences between group sizes with the MS vs it being removed.

This group was shot at 500 yards with the MS attached. The chambering is. 284 Shehane on a Brux 1.250 straight barrel and a Bat M action. The entire rig weighs 28# and shot free recoil.

Now here's the exact same load at the same sitting with the MS removed.

At 100 yards you any not see a difference in groups but the test I did clearly shows it at 500 yards

 

[coford]

First off - I really like my Magnetospeed. I have two other chronographs and they stay home most of the time now.

I have noticed a small POI change at all distances. The POI changes at close ranges are not significant but they are there. At longer distances the changes in POI can be significant.

I have shot with my MS on at 600 and 1000 and my groups are larger and the dispersion is different. At 1000 especially I see both vertical and horizontal spreading of my shots. Enough so that I don't do my chrono work and my accuracy load development at the same time.

The good news is that don't have much need to do that. I work up my loads with a velocity range in mind. I chrono my loads to get into the velocity and SD range I want and then start with the serious target work (without the Magnetospeed attached).

One other benefit with the MS is I sometimes chronograph at night. I might want to try a new lot of powder, a new load, or re-check velocity on a load at a different temperature. The MS doesn't require light to work so if all I want is a velocity check I can run out to a safe place and fire off my rounds into an adequate backstop (I have access to a gravel pit very close to my house). It allows me to gain data at times when traveling to the range (1 hour away) is impractical, when the wind is howling, or the weather is too nasty to shoot for very long.

Your results may vary and what I do may not work for you - good shooting!

 

[6BRinNZ]

I'm not sure what distances the guys noted they are testing the MS with and only a POI change. My results show differently at 500 yards with the MS on and off. I can't attest to POI change because I dialed my scope for a different impact to verify differences between group sizes with the MS vs it being removed.

This group was shot at 500 yards with the MS attached. The chambering is. 284 Shehane on a Brux 1.250 straight barrel and a Bat M action. The entire rig weighs 28# and shot free recoil.

Now here's the exact same load at the same sitting with the MS removed.

At 100 yards you any not see a difference in groups but the test I did clearly shows it at 500 yards

I think this Post is the same as the other one in another thread where a brake was removed as well - negating the statement - harmonics can't apply to magnetos and not brakes?

Probably would HAVE to remove a brake or there wouldn't have been any more magneto speed to use

Another disadvantage of Magnetospeed for the list I suppose...

So was the group without the magnetospeed fired without the brake as well or did you screw it back on?

I screwed it back on.

Thanks - I just can't see how the vertical can be solely attributed to the magneto in this case - as I would expect both to affect harmonics.

OP - you are running a risk as a magneto goes against well understood and measured barrel tuners where very small changes have an impact to group size. Definition of terminology becomes important when statements like "no change" are made.

I personally have a magneto but don't use it in initial load development. I load dev at 100 yards. I use the magneto during club days to capture numbers in true match conditions.

I can state that for F-class shooting I haven't noticed any change to my scores from 300 out to 1000 yards with the magneto strapped on. I do have to come down ~ 1 moa for POI. I can't state that the group size is unchanged under these conditions as I can't measure the groups. In terms of perception I notice no difference to vertical and in two relays at 1000 I came away thinking it seemed better with it strapped on - 40 shots within 10 ring vertical at 1000.

 

[comagutsa]

I have used my mates magnetospeed a few times and love it but I did a test with it on and then off and this is what I got, so make of it as you want .. done at 200m or 300m (I cant remember now and done with my 6BR and 105gr hybrids)



i will continue to use one for my load testing

 

[searcher]

I have noticed very little (if any) change in impact with my heavy bench barrels - but definitely have with my thinner sporter barrels. I use mine during load development and check my final tune without it. I have the first model and bought the bayonet for the heavy barrels later. Really like it. Sometimes I just want to pop off a few without having to set everything up - sure is nice for that too.

 

[jlow]

I generally agree that it makes sense that the MS can in fact act as a tuner. However, all these groups that have been posted are not definitive proof that this is happening.

I can see differences between with and without the MS but what is missing is the wrap around i.e. without, with, and without, with. So what would be reasonably convincing (remember this is still and n=2 for each condition) is to show that the groups done without is identical, and with is identical, and they are different from each other. Without this, one could say that what we have are two different groups and as all of us know, even shooting the same ammo out of the same gun at the same target sometimes gives us different looking groups.

 

[SDDasher]

I generally agree that it makes sense that the MS can in fact act as a tuner. However, all these groups that have been posted are not definitive proof that this is happening.

I can see differences between with and without the MS but what is missing is the wrap around i.e. without, with, and without, with. So what would be reasonably convincing (remember this is still and n=2 for each condition) is to show that the groups done without is identical, and with is identical, and they are different from each other. Without this, one could say that what we have are two different groups and as all of us know, even shooting the same ammo out of the same gun at the same target sometimes gives us different looking groups.

😳whhhhhhhhhaaaaaaaaaaaaatttttttttttttttt???????????????? Who's on first? 😂😂😂

 

[Coolhand]

6BR , bloke over here , well respected Gunsmith has conducted the same evaluation during FClass Open Matches where he attached the magnetospeed during a string , the idea being to correlate verticals and velocities against points lost due to vertical displacement.
The result was that his .280AI did not suffer due to the magnetospeed being attached from his known zero.
I have a magnetospeed also and near as I can determine either your barrel will or it won't shift POI with it attached, not very scientific but there you are.

Mike.