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Old 12-06-2021, 11:04 AM   #1
Witchgrass
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Just read several posts on Sniperhide about thread barrels(for suppressor) having a detriment to accuracy. Any of you ever noticed this? There were several videos, and lots of ‘heated’ debate on the subject.
TIA,

Vaya Con Dios.
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Old 12-06-2021, 11:09 AM   #2
Gunnyart
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If Joe Blow Gunsmith is running a tap over the end of your barrel it won't be concentric to the bore, but take it to a pro like APR and they'll single point cut it and you'll be just fine. IMO
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Old 12-06-2021, 11:15 AM   #3
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No issues here
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Old 12-06-2021, 11:27 AM   #4
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I guess it could technically change the harmonics of an existing barrel since you are removing material from the end of the barrel and slightly alter groups, as can any barrel work or change in muzzle device (which is why barrel tuners exist). However, if there's anything more than a minimal change, you need a new gunsmith or there's probably another issue.

Just take a look at 95% of custom rifles, or go to any precision rifle competition. Almost everybody has threaded barrels and are running some sort of muzzle device. If threading was an issue, that wouldn't be the case.

Last edited by Raider4044; 12-06-2021 at 11:31 AM.
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Old 12-06-2021, 11:36 AM   #5
trophy8
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Just because they are on snipershide doesn’t mean they aren’t stupid. Lol.

There’s some ignorant stuff on there.

When done right it’s fine. Every single rifle I have is threaded besides 1 rimfire I believe.
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Old 12-06-2021, 11:42 AM   #6
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Take it to a quality smith like APR or Mark Pharr at Tumbleweed Firearms and ignore snipershide
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Old 12-06-2021, 12:56 PM   #7
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I haven't seen a loss of accuracy with any of mine. If anything they may even shoot better (at least I do anyway). Some people confuse accuracy with POI change which I will say I do see when I go from suppressor to no suppressor on each rifle. But accuracy of the gun doesn't change.

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Old 12-06-2021, 04:01 PM   #8
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my 260 rpr has a threaded aftermarket barrel .. ruger never made a 260 ... it shoots like crap! see for yourself.
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Old 12-06-2021, 04:02 PM   #9
M16
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I wonder why f class shooter have threaded barrels? Maybe those itty bitty groups at 1000 yards would be tighter if they used an unthreaded barrel.
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Old 12-07-2021, 04:54 PM   #10
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I have 2 that are factory threaded. With suppressor there was no difference in accuracy, but did see a significant shift in point of impact. Changed POI 4 1/2" on both rifles. One was straight down and the other was straight to the right of the POI without the suppressor.
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Old 12-07-2021, 05:16 PM   #11
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I single point all of mine and they are concentric within a few tenths. Only way to do it. Same thing if I need an adapter to go from 1/2-28 to 5/8-24.
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Old 12-08-2021, 08:01 PM   #12
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Quote:
Originally Posted by kmitchl View Post
I single point all of mine and they are concentric within a few tenths.
Tenths of an inch? That's gonna leave a hell of a baffle strike.
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Old 12-08-2021, 08:05 PM   #13
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Quote:
Originally Posted by M16 View Post
Tenths of an inch? That's gonna leave a hell of a baffle strike.
Tenths of one thousand of an inch. 0.0001”
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Old 12-10-2021, 12:41 PM   #14
imyomama
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Quote:
Originally Posted by kmitchl View Post
Tenths of one thousand of an inch. 0.0001”
wow 100 micron .. i'm impressed!
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Old 12-11-2021, 10:37 AM   #15
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Quote:
Originally Posted by imyomama View Post
wow 100 micron .. i'm impressed!
I mean, this is what I indicate to…less than two tenths surely. But I see what you’re saying about the wording

Last edited by kck; 12-11-2021 at 10:40 AM.
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Old 12-11-2021, 10:53 AM   #16
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Witchgrass, what they’re probably referring to is the possibility of the muzzle stress relieving after the material is taken off. However, it prolly ain’t happening. Could you check measurement inconsistencies from the muzzle back a half inch plus with a set of honed or ground pins? Yeah, you could, but meh….A sharp, single point tool and a decent oil will keep the barrel cool while machining. I do quite a few 30 cal barrels for guys that bring me off the shelf stuff and thread 1/2-28 (pencil barrels so no choice in the matter) and they normally shoot better after I finish. However, I cut a new crown on them as well since factory crowns tend not be up to par. Long story short, as long as your GS does their job correctly, you should have no issue with threading having an effect on accuracy. Disclaimer: I’m excluding benchrest guys because the shoot 1,000 lb. guns and they are a little different anyway I kid, I kid

Last edited by kck; 12-11-2021 at 10:56 AM.
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Old 12-12-2021, 12:34 PM   #17
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Quote:
Originally Posted by kmitchl View Post
I single point all of mine and they are concentric within a few tenths. Only way to do it. Same thing if I need an adapter to go from 1/2-28 to 5/8-24.
Sorry to be off topic but that avatar is too funny.
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Old 12-12-2021, 01:39 PM   #18
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Quote:
Originally Posted by kck View Post
Witchgrass, what they’re probably referring to is the possibility of the muzzle stress relieving after the material is taken off. However, it prolly ain’t happening. Could you check measurement inconsistencies from the muzzle back a half inch plus with a set of honed or ground pins? Yeah, you could, but meh….A sharp, single point tool and a decent oil will keep the barrel cool while machining. I do quite a few 30 cal barrels for guys that bring me off the shelf stuff and thread 1/2-28 (pencil barrels so no choice in the matter) and they normally shoot better after I finish. However, I cut a new crown on them as well since factory crowns tend not be up to par. Long story short, as long as your GS does their job correctly, you should have no issue with threading having an effect on accuracy. Disclaimer: I’m excluding benchrest guys because the shoot 1,000 lb. guns and they are a little different anyway I kid, I kid
Good post KCK! Was gonna post something similar when I saw this earlier but didn't want to open the can of worms Threading the smaller contours does without a doubt open up bore diameter under the threaded portion of barrel. Sometimes it's more than you'd think. It's also in about the worst spot you'd want to see a loose spot in the bore since it's right in the last spot the bullet is influenced by the bore. Ideally, you'd actually want a slight choke in that section. On paper and in theory its all wrong.....BUT....in the real world it rarely causes any noticeable accuracy degradation. We always try to make sure our customers are aware of the "potential" issues, but can only recall one instance where it caused an actual accuracy issue.
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Old 12-12-2021, 11:57 PM   #19
XR650RRider
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Kimber threads the 300 Win Mag Montana 7/16"x28
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