texashuntingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
LoneStarCigar, MH blkdog, LUKE22, Little L, WBRC
70569 Registered Users
Top Posters(All Time)
dogcatcher 110,643
bill oxner 91,416
SnakeWrangler 64,130
stxranchman 60,271
Gravytrain 46,950
RKHarm24 44,585
rifleman 44,461
BMD 41,241
Forum Statistics
Forums46
Topics616,091
Posts11,411,322
Members85,569
Most Online19,184
Feb 5th, 2020
Print Thread
POI shift #8556870 03/15/22 03:32 PM
Joined: Aug 2014
Posts: 1,683
B
Bigfoot Offline OP
Pro Tracker
OP Offline
Pro Tracker
B
Joined: Aug 2014
Posts: 1,683
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?


I WILL NOT COMPLY!! Let's go Brandon!!!!
Re: POI shift [Re: Bigfoot] #8556889 03/15/22 04:12 PM
Joined: Sep 2009
Posts: 4,670
C
ccoker Online Content
Extreme Tracker
Online Content
Extreme Tracker
C
Joined: Sep 2009
Posts: 4,670
I wouldn't expect much..

Re: POI shift [Re: Bigfoot] #8556896 03/15/22 04:24 PM
Joined: Jan 2009
Posts: 17,778
J
Judd Online Confused
#1 Creedmoor Fan
Online Confused
#1 Creedmoor Fan
J
Joined: Jan 2009
Posts: 17,778
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.


Originally Posted by Phil Robertson
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
Re: POI shift [Re: Bigfoot] #8556900 03/15/22 04:28 PM
Joined: Dec 2008
Posts: 38,682
J.G. Online Content
THF Celebrity
Online Content
THF Celebrity
Joined: Dec 2008
Posts: 38,682
"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.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: POI shift [Re: Bigfoot] #8556916 03/15/22 04:43 PM
Joined: Jun 2009
Posts: 3,972
K
Korean Redneck Online Content
Extreme Tracker
Online Content
Extreme Tracker
K
Joined: Jun 2009
Posts: 3,972
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.

Re: POI shift [Re: Bigfoot] #8556936 03/15/22 05:06 PM
Joined: Aug 2014
Posts: 1,683
B
Bigfoot Offline OP
Pro Tracker
OP Offline
Pro Tracker
B
Joined: Aug 2014
Posts: 1,683
Ok Ill head to the range before I hit the field next week.

Thanks


I WILL NOT COMPLY!! Let's go Brandon!!!!
Re: POI shift [Re: Judd] #8556952 03/15/22 05:24 PM
Joined: Jul 2014
Posts: 4,737
onlysmith&wesson Online Content
Extreme Tracker
Online Content
Extreme Tracker
Joined: Jul 2014
Posts: 4,737
Originally Posted by Judd
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.
Re: POI shift [Re: Bigfoot] #8557051 03/15/22 07:12 PM
Joined: Sep 2009
Posts: 4,670
C
ccoker Online Content
Extreme Tracker
Online Content
Extreme Tracker
C
Joined: Sep 2009
Posts: 4,670
yes, definitely need to confirm zero !

but I wouldn't expect more than a MOA or so of change at 100 yards

Re: POI shift [Re: Bigfoot] #8557064 03/15/22 07:26 PM
Joined: Jun 2009
Posts: 3,972
K
Korean Redneck Online Content
Extreme Tracker
Online Content
Extreme Tracker
K
Joined: Jun 2009
Posts: 3,972
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.

Re: POI shift [Re: Bigfoot] #8557098 03/15/22 07:58 PM
Joined: Jan 2009
Posts: 17,778
J
Judd Online Confused
#1 Creedmoor Fan
Online Confused
#1 Creedmoor Fan
J
Joined: Jan 2009
Posts: 17,778
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...

Originally Posted by Phil Robertson
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
Re: POI shift [Re: Judd] #8557108 03/15/22 08:09 PM
Joined: Dec 2008
Posts: 38,682
J.G. Online Content
THF Celebrity
Online Content
THF Celebrity
Joined: Dec 2008
Posts: 38,682
Originally Posted by Judd
I've never seen zero shift for a suppressor.


Huh?

I can't remember one NOT shifting zero.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: POI shift [Re: J.G.] #8557116 03/15/22 08:24 PM
Joined: Jul 2014
Posts: 4,737
onlysmith&wesson Online Content
Extreme Tracker
Online Content
Extreme Tracker
Joined: Jul 2014
Posts: 4,737
Originally Posted by FiremanJG
Originally Posted by Judd
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.
Re: POI shift [Re: Bigfoot] #8557138 03/15/22 08:45 PM
Joined: Jan 2009
Posts: 17,778
J
Judd Online Confused
#1 Creedmoor Fan
Online Confused
#1 Creedmoor Fan
J
Joined: Jan 2009
Posts: 17,778
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.


Originally Posted by Phil Robertson
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
Re: POI shift [Re: Judd] #8557140 03/15/22 08:48 PM
Joined: Jul 2014
Posts: 4,737
onlysmith&wesson Online Content
Extreme Tracker
Online Content
Extreme Tracker
Joined: Jul 2014
Posts: 4,737
Originally Posted by Judd
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.
Re: POI shift [Re: onlysmith&wesson] #8557387 03/16/22 01:35 AM
Joined: Jan 2009
Posts: 17,778
J
Judd Online Confused
#1 Creedmoor Fan
Online Confused
#1 Creedmoor Fan
J
Joined: Jan 2009
Posts: 17,778
Originally Posted by onlysmith&wesson
Originally Posted by Judd
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.


rofl up yes sir wink


Originally Posted by Phil Robertson
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
Previous Thread
Index
Next Thread

© 2004-2022 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
Powered by UBB.threads™ PHP Forum Software 7.7.3