Magneto Speed mods

[Mdhmsmith]

Another thread inspired me to come up with something today. I used a Blackhawk picatinny riser, an AR height 1” scope base and a cheap Weaver 1” ring to adapt to the little pic rail on my stock. I had all the stuff on hand except the .058” wall 1” Al tubing. I got that for $26. I had already ground the bayonet mount down to fit my Harvester 300 can. I also ground slots in the bayonet body for the Weaver ring to grip. If this solves the poi change issue, I’ll probably use some structural epoxy to permanently attach it. I put the strap forward of the mount to avoid a worst case scenario of the bayonet flipping into the bullet path if anything comes loose. The whole setup is pretty rigid and I’m not too worried. The bayonet strapped to the can caused an 8” drop in poi at 700 yards. Not anymore.

 

[kelbro]

Nice! Have you tried it yet? Tuning fork effect? I can't imagine that not resonating.

 

[338 dude]

I got this mount from Weiser precision with the carbon fiber tube the tube was later shortened

 

[Mdhmsmith]

Nice! Have you tried it yet? Tuning fork effect? I can't imagine that not resonating.

It will resonate, no doubt about it. But moving that weight off of the barrel will greatly reduce poi disturbance.

 

[Mdhmsmith]

I got this mount from Weiser precision with the carbon fiber tube the tube was later shortenedView attachment 1239181

How is this working for you? Cheaper than Labradar for sure.

 

[Dusty Stevens]

Them labradars sure are nice

 

[338 dude]

How is this working for you? Cheaper than Labradar for sure.

I like it very much with the quick detach and the atlas rail it is on and off in seconds and completely self-contained a lot of people get hung up on chronograph numbers as I got this and was checking every round I have since started to work up a good load when verified a good load then I’ll checkVelocity for my ballistic program a lot of people get hung up on a certain velocity window and can be influenced by a number

 

[STOMP442]

Why are you guys needing to shoot with the magneto attached at all? Find a load that your rifle likes attach the magneto, fire some rounds, get the data you need, and take it off. No POI change and no extra equipment you have to deal with.

 

[rijndael]

Because it's helpful to have the data.

I like to keep it on during my ladder tests to find the velocity changes for each charge increment. I also like use it when shooting beyond 1K, so I know if low or high shots were the result of a charge issue.

I do all of my load workups with the MS attached.

 

[XL105]

I got this mount from Weiser precision with the carbon fiber tube the tube was later shortenedView attachment 1239181

I have been thinking buying one of these. Can it be attach to rifle sling stud? Some of my rifles don’t have rail attach to end of stock. I would like to be able to attach it and my bipod at same time.

 

[rijndael]

Natively, it's Pic or Arca.

You can get sling stud to picatinny adapters. I don't know how well they work.

 

[STOMP442]

Because it's helpful to have the data.

I like to keep it on during my ladder tests to find the velocity changes for each charge increment. I also like use it when shooting beyond 1K, so I know if low or high shots were the result of a charge issue.

I do all of my load workups with the MS attached.

This just seems weird to me and maybe its just me, but if you do all your load work ups with all of this stuff attached then it would make sense to me that you would always have to shoot your rife set up the same way for consistency. I for one would hate to have to hunt that way or compete that way. I like to let the targets tell me what the rifle likes not the numbers on a screen. When I am happy with the groups I attach my Magneto fire 10 rounds or so and record my data and call it done. I try not to get caught up with numbers it either shoots or it doesn't. If its a little slower than I wanted so be it. I'm not trying to be argumentative just talking.

 

[rijndael]

I for one would hate to have to hunt that way or compete that way.

I only use it when stationary. If I'm going to the range to work on positional shooting, I don't use it.

I like to let the targets tell me what the rifle likes not the numbers on a screen.

I use targets too, but when something doesn't line up well, it's good to have more data to tell the story. Overall, I like having more data to look at, rather than less. It let's me track stuff like clean/cold bore shot velocity differences and other tidbits.

 

[Mdhmsmith]

This just seems weird to me and maybe its just me, but if you do all your load work ups with all of this stuff attached then it would make sense to me that you would always have to shoot your rife set up the same way for consistency. I for one would hate to have to hunt that way or compete that way. I like to let the targets tell me what the rifle likes not the numbers on a screen. When I am happy with the groups I attach my Magneto fire 10 rounds or so and record my data and call it done. I try not to get caught up with numbers it either shoots or it doesn't. If its a little slower than I wanted so be it. I'm not trying to be argumentative just talking.

The biggest drawback of the Magneto speed is that because it mounts to the barrel it has some effect on barrel harmonics. I have done purely target and distance based load work ups up until the last few years. IF, by changing the mounting method, you can reasonably isolate the bayonet sensor from the barrel movement, it means you can monitor speed, ES and SD during load work up. In theory this helps you make informed choices, helps mitigate shooter error and interpreting group size and hopefully saves components. I shot a new load at 1075 yards and elevation was perfect out of the box with the ballistic app drops. I drove out and checked the target, fired another 5 rounds of the same load and I was .5 mil low. WTF? I left the ammo box on the table for 15 min while checking the target and jacking around and the powder got cold. Dumb on my part to shoot warm ammo right out of the truck and let powder temp be a variable. Labradar or an optical chrony could have collected the numbers and helped me come up with a temp sensitivity factor but shooting for groups at 1075 yards with a magneto speed attached to the barrel is a waste of time. That’s my reasoning anyway. I’ll let you know how it works out. There is no way to completely isolate a weight on a pole (tuning fork) from the harmonics of the barrel.

 

[CA_Shooter]

I use a magnetospeed and have read through many threads about POI and group size changes.

For POI: generally people say POI changes. But this doesn't matter.

Group size and shape: some people say it makes changes and others say it doesn't. Not sure if heavy barrels are as impacted as lighter barrels.

I've been looking at the wiser precision mount

 

[rjtfroggy]

When I get back to moving around I'm going to drill out a 1/4" whole in a 1 1/8th wooden dowel and use a 1/4" thread rod and screw it in where my fore end stop goes on my front rest and see how it does.