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POI shift
#8556870
03/15/22 03:32 PM
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Joined: Aug 2014
Posts: 1,816
Bigfoot
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I just had my barrel on my sako threaded and I installed a new dead air muzzle break.
Can i expect a significant shift in POI?
GO TRUMP!
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Re: POI shift
[Re: Bigfoot]
#8556889
03/15/22 04:12 PM
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Joined: Sep 2009
Posts: 4,755
ccoker
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Re: POI shift
[Re: Bigfoot]
#8556896
03/15/22 04:24 PM
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Joined: Jan 2009
Posts: 19,253
Judd
#1 Creedmoor Fan
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#1 Creedmoor Fan
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Yes. My experience is, it'll be significant enough you could miss an animal at a couple hundred yards.
I've heard all the stuff about POI not changing on TB suppressors. However, I'm not from MO but you'd have to show me that it doesn't happen.
Don't let your ears hear what your eyes didn't see, and don't let your mouth say what your heart doesn't feel
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Re: POI shift
[Re: Bigfoot]
#8556900
03/15/22 04:28 PM
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Joined: Dec 2008
Posts: 41,173
J.G.
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"Significant" I doubt it, but it will most likely shift.
Any time you change the muzzle, check zero and reshoot the distances you typically shoot. Shortening the barrel, adding a brake or suppressor, things can and often do change.
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Re: POI shift
[Re: Bigfoot]
#8556916
03/15/22 04:43 PM
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Joined: Jun 2009
Posts: 4,200
Korean Redneck
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Depends on the term significant. I've had a couple rifle threaded. Basically is it significant enough to re-zero? For sure yes I would at least check/re-zero based on my limited experience of 2. I've noticed POI shift with NO muzzle device and then with a brake.
I'm a dude who likes long barrels!
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Re: POI shift
[Re: Bigfoot]
#8556936
03/15/22 05:06 PM
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Joined: Aug 2014
Posts: 1,816
Bigfoot
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Ok Ill head to the range before I hit the field next week.
Thanks
GO TRUMP!
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Re: POI shift
[Re: Judd]
#8556952
03/15/22 05:24 PM
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Joined: Jul 2014
Posts: 6,335
onlysmith&wesson
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Yes. My experience is, it'll be significant enough you could miss an animal at a couple hundred yards.
I've heard all the stuff about POI not changing on TB suppressors. However, I'm not from MO but you'd have to show me that it doesn't happen. Exactly, what's a couple of shots? I'm thinking about it on a 20" CTR in .308. My buddy put one on a 24" CTR, 6.5 Creedmoor. Still grouped nice, just in a different place. Nothing a quick zero wouldn't fix. It is interesting though, to hear the amount of shift in POI, and increase, or maybe a decrease in grouping one can cause as it relates to the barrel.
An unethical shot is one you take, that you know you shouldn't.
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Re: POI shift
[Re: Bigfoot]
#8557051
03/15/22 07:12 PM
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Joined: Sep 2009
Posts: 4,755
ccoker
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yes, definitely need to confirm zero !
but I wouldn't expect more than a MOA or so of change at 100 yards
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Re: POI shift
[Re: Bigfoot]
#8557064
03/15/22 07:26 PM
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Joined: Jun 2009
Posts: 4,200
Korean Redneck
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I actually played with this once and looked at notes and pics. There's just one load in one rifle that I I have 100% confidence in. I've shoot in multiple configurations basically all had poi shifts. So nothing with the threads exposed, not even a thread protector, was the base case at 100yds all 5 shot group estimates. I didn't notice anything with a thread protector. A single port Silencerco brake had a small, but noticeable, about an inch-ish or less to the left and down. I have an Omega 300 mounted on the brake and it shifted closer to 1.5-2.0" in a similar left and down. A magnetospeed strapped on with the same brake was about 2.0" straight down. Never tried suppressor direct mount or magnetospeed without the brake.
I'm a dude who likes long barrels!
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Re: POI shift
[Re: Bigfoot]
#8557098
03/15/22 07:58 PM
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Joined: Jan 2009
Posts: 19,253
Judd
#1 Creedmoor Fan
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#1 Creedmoor Fan
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Adding my suppressor cover will drop my group 1/2" at 100y on one of my guns...it's a 1/4" on another that has a thinner barrel. You just have to shoot them and find out but zero, I've never seen 0 shift for a suppressor.
Last edited by Judd; 03/15/22 08:44 PM. Reason: fixed for clarification...
Don't let your ears hear what your eyes didn't see, and don't let your mouth say what your heart doesn't feel
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Re: POI shift
[Re: Judd]
#8557108
03/15/22 08:09 PM
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Joined: Dec 2008
Posts: 41,173
J.G.
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I've never seen zero shift for a suppressor. Huh? I can't remember one NOT shifting zero.
800 Yard Steel Range Precision Rifle Instruction Memberships and Classes Available
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Re: POI shift
[Re: J.G.]
#8557116
03/15/22 08:24 PM
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Joined: Jul 2014
Posts: 6,335
onlysmith&wesson
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I've never seen zero shift for a suppressor. Huh? I can't remember one NOT shifting zero. He must mean "0", right?
An unethical shot is one you take, that you know you shouldn't.
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Re: POI shift
[Re: Bigfoot]
#8557138
03/15/22 08:45 PM
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Joined: Jan 2009
Posts: 19,253
Judd
#1 Creedmoor Fan
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#1 Creedmoor Fan
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Yes...os&w, you're correct...I've always seen a shift.
Sorry...I guess I should've used the number and not spelled it out. I edited to clarify.
Don't let your ears hear what your eyes didn't see, and don't let your mouth say what your heart doesn't feel
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Re: POI shift
[Re: Judd]
#8557140
03/15/22 08:48 PM
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Joined: Jul 2014
Posts: 6,335
onlysmith&wesson
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Yes...os&w, you're correct...I've always seen a shift.
Sorry...I guess I should've used the number and not spelled it out. I edited to clarify. It's alright, Don't let it happen again.
An unethical shot is one you take, that you know you shouldn't.
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Re: POI shift
[Re: onlysmith&wesson]
#8557387
03/16/22 01:35 AM
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Joined: Jan 2009
Posts: 19,253
Judd
#1 Creedmoor Fan
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#1 Creedmoor Fan
Joined: Jan 2009
Posts: 19,253 |
Yes...os&w, you're correct...I've always seen a shift.
Sorry...I guess I should've used the number and not spelled it out. I edited to clarify. It's alright, Don't let it happen again. yes sir
Don't let your ears hear what your eyes didn't see, and don't let your mouth say what your heart doesn't feel
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