Ditch the POI shift! 25% off Magneto Mounts and I have a healthy stock.

Tyler Kemp

Tyler Kemp

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Aug 23, 2008
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mkmachining.com
#1
In addition to 25% off billet scope levels/levers, I've finally caught up on Magneto Mounts. If you buy them all I would be very impressed...and stoked.

Simply the best way to get your Magnetospeed off the barrel. All aluminum and stainless construction, with a myriad of adjustments possible.

mkmachining.com

MK Machining Gen III Magnetospeed Mount

MK Machining Gen III Magnetospeed Mount We’ve made substantial improvements to our very popular Magnetospeed Mount for better performance.
mkmachining.com mkmachining.com

Thanks to an awesome customer Dusty for these cool shots showing the mount in action. You will dig it, go shooting for a few range sessions while testing loads and the device pays for itself!

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#2
Thank you @Tyler Kemp ! Monday I went to the range and tried to use my MagnetoSpeedV3 after installing the Aaron Hipp Barrel Tuner. When I try to put the MagnetoSpeed on....it sits too far back and not enough of the silver piece is in front of the muzzle. I got really erratic readings and had to take it off and use the Labradar.

With an ARCA mount I can not only alleviate this issue but it will be much easier to change from rifle to rifle. This post was perfect timing for me.
 
#9
Does anyone have a creative storage solution for the Chrono and mount in a backpack friendly package? I didn't know about the soft case option when I purchased my v3, so I currently only have the hard case and it's huge compared to what it needs to be.

Note that I'm happy to spawn this off into a new thread if it gets out of hand.
 
#10
Does anyone have data and proof on paper that this mount doesn’t affect POI or group size if doing OCW testing? I understand not being attached to the barrel it will eliminate potential harmonic effects, but I’ve read that the Magnetospeed itself will still interact with the exiting bullet and gas and deflect the flight of the bullet.

Really just groups on paper with and without the MK MS mount would be cool.

Thanks!
 
#11
samb300 said:
Does anyone have data and proof on paper that this mount doesn’t affect POI or group size if doing OCW testing? I understand not being attached to the barrel it will eliminate potential harmonic effects, but I’ve read that the Magnetospeed itself will still interact with the exiting bullet and gas and deflect the flight of the bullet.

Really just groups on paper with and without the MK MS mount would be cool.

Thanks!
Click to expand...

This probably needs a thread of its own.
 
#14
spife7980 said:
From what Ive gathered: it can if you have it really close but you also don’t need to have it that close for good results.
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I’ve always mounted the MS bayonet to within the recommended distance-to-bore using the square tube alignment rod. I have not tested velocity accuracy or repeatability with the bayonet being farther away than that, as it goes outside of the manufacturer spec, which must be there for a reason.

I’m not badmouthing MK or anything, it’s just the thread title is “Ditch the POI Shift” so I would think data to prove that statement would be readily available. I’m not going to buy one just to test myself.
 
#15
I have hundreds of customers using the mount during, those including ELR competitions, F-Class, etc, with no shift.

I personally use my mount and rifles all the time and rapidly go from 100 yards to 1000 with no shift.

I do NOT have the capability to do a formal scientific test of the Magnetospeed theory, but I have not once in probably 1000 Gen1/Gen2/Gen3 mounts had someone complain their shift was not mitigated. Gas coming out behind a bullet, bouncing off the bayonet, catching up with the bullet, and moving it....just doesn't seem realistic to me, and I'd like to see some scientific basis of this.

On the other hand, I've been told strapping a weight to the barrel isn't what changes the point of impact, it's the gas bouncing off the bayonet. This simply makes no sense, and adding something onto your barrel absolutely, 100% can and will change harmonics, which 100% can and possibly leads to a POI shift. Anyone serious about rimfire and has used a tuner knows this.
 
#16
Tyler Kemp said:
I have hundreds of customers using the mount during, those including ELR competitions, F-Class, etc, with no shift.

I personally use my mount and rifles all the time and rapidly go from 100 yards to 1000 with no shift.

I do NOT have the capability to do a formal scientific test of the Magnetospeed theory, but I have not once in probably 1000 Gen1/Gen2/Gen3 mounts had someone complain their shift was not mitigated. Gas coming out behind a bullet, bouncing off the bayonet, catching up with the bullet, and moving it....just doesn't seem realistic to me, and I'd like to see some scientific basis of this.

On the other hand, I've been told strapping a weight to the barrel isn't what changes the point of impact, it's the gas bouncing off the bayonet. This simply makes no sense, and adding something onto your barrel absolutely, 100% can and will change harmonics, which 100% can and possibly leads to a POI shift. Anyone serious about rimfire and has used a tuner knows this.
Click to expand...
Every barrel I've ever shot on my AI with a MS attached to it (with or without a suppressor) has shifted the POI "up" by anywhere from 0.1 to 0.5 mils. Seems like more than a coincidence to me that the group is always up. At the same time, I don't find that my group size changes significantly. So I could make the argument that the MS is indeed affecting POI more than group size (for me). I will also add that I mount the MS to within the manufacturer specified distance to bore (0.125 - 0.25" from bayonet face to "bottom of bullet"), so if the bayonet is farther away than 0.25" maybe it starts affecting POI less, at the expense of how well it picks up the bullet.

The newfound popularity of tuners isn't for changing POI, it's for tuning the group size. I haven't seen data that shows tuning the weight at the muzzle will cause large POI shifts. Obviously attaching a heavy suppressor to the muzzle is likely to cause a POI shift downward by drooping the barrel.

I'm not asking for a "formal scientific test."
- Zero the gun at 100 yards..
- Shoot a 5-round group at 100 with that zero.
- Attach the MS via the barrel and shoot a 5-round group to measure POI shift
- Attach the MS via the MK mount and shoot a 5-round group to measure POI shift

This might sound snarky, but if hundreds of customers have done this, and you have shot it all the time via testing, I can't believe this data wouldn't exist considering the product is being marketed as eliminating the POI shift of a MS. Wouldn't something like this 20-round test have been the first thing you did to verify the product worked as intended?
 
#17
Lighten up Francis. I for one am happy this product exists on the market, and purchased one thanks to the discount. This is absolutely a benefit to not have to attach it to the barrel, which definitely affects the POI.

Thanks @Tyler Kemp ! 🤙
 
#18
mtruong said:
Lighten up Francis. I for one am happy this product exists on the market, and purchased one thanks to the discount. This is absolutely a benefit to not have to attach it to the barrel, which definitely affects the POI.

Thanks @Tyler Kemp ! 🤙
Click to expand...
My comments on this thread are related to the fact that I want to buy one of these mounts, assuming they do what they claim to do.

When you get yours, please test the POI shift of the MS on the barrel versus on the MK mount and let me know the results. You already said attaching it to the barrel affects the POI, is it consistent and have you documented it? Does it happen to shift the groups "up" every time like mine does? Does it alter your POI as well as your group size?
 
#20
samb300 said:
My comments on this thread are related to the fact that I want to buy one of these mounts, assuming they do what they claim to do.

When you get yours, please test the POI shift of the MS on the barrel versus on the MK mount and let me know the results. You already said attaching it to the barrel affects the POI, is it consistent and have you documented it? Does it happen to shift the groups "up" every time like mine does? Does it alter your POI as well as your group size?
Click to expand...

If you get a mount and aren't satisfied, just send er back for a refund! Strapping your bayo to your barrel is going to be consistent if you do it the exact same every single time. Because you're mounting a weight on a body to induce the same harmonics. 1/4" in one direction or the other is going to to change this. Where the bayo is clocked on the barrel will change this. etc
 
#23
Tyler Kemp said:
If you get a mount and aren't satisfied, just send er back for a refund! Strapping your bayo to your barrel is going to be consistent if you do it the exact same every single time. Because you're mounting a weight on a body to induce the same harmonics. 1/4" in one direction or the other is going to to change this. Where the bayo is clocked on the barrel will change this. etc
Click to expand...
Again, I’m not going to buy your product to do the testing you should have already done to prove it does what you claim it does.

I won’t go so far as to claim you haven’t tested this explicitly, but I find it odd that you don’t have anything but anecdotal comments on how there is no POI shift.

After reading through past threads, there are multiple users who have experienced a POI shift with the MK mount. So clearly my questions/doubts aren’t unfounded. It doesn’t appear to be every user, but it’s not zero either.
 
#24
samb300 said:
Again, I’m not going to buy your product to do the testing you should have already done to prove it does what you claim it does.

I won’t go so far as to claim you haven’t tested this explicitly, but I find it odd that you don’t have anything but anecdotal comments on how there is no POI shift.

After reading through past threads, there are multiple users who have experienced a POI shift with the MK mount. So clearly my questions/doubts aren’t unfounded. It doesn’t appear to be every user, but it’s not zero either.
Click to expand...

Okie dokie, thanks for the time you've spent giving your thoughts!
 
#26
samb300 said:
A condescending response and a continued lack of data to support your advertised claims. Thanks, I’ll exit this thread now that I got the information I was looking for.
Click to expand...

I have no idea how you'd plan to do some scientific testing without massive time and cost, and as the owner of a very small company that is nowhere near as feasible as an offer of a refund if you aren't happy. Lol.
 
#27
As I sit here reading this thread....I just realized that I have a package in my post office box from Mr. Tyler....heh...I better go outside in the cold and get it. I have the next two days off and I can't wait to use this thing.
 
#28
for what its worth ive been running my self-built MS "off barrel mount" all year. with it originally strapped to the barrel I would get POI shifts from zero. since moving it off the barrel, I can do my grouping work and even ran a few stages with the mount still on and it has no affect on accuracy as it does with it on the barrel. now if there is a shift due to the bayonet being close to the bore, well, its undetectable in my experience
 
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