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BCG impact on accuracy?
#9079796
07/22/24 12:56 PM
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Joined: Jan 2008
Posts: 9,483
scot
OP
THF Trophy Hunter
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OP
THF Trophy Hunter
Joined: Jan 2008
Posts: 9,483 |
With a bolt action rifle, it is assumed that trueing a bolt face enhances accuracy.
With an AR-15, what impact does the bolt/bcg have on accuracy with many companies selling premium bcg’s?
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Re: BCG impact on accuracy?
[Re: scot]
#9079800
07/22/24 12:58 PM
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Joined: Sep 2021
Posts: 402
Big Sam
Bird Dog
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Bird Dog
Joined: Sep 2021
Posts: 402 |
With a bolt action rifle, it is assumed that trueing a bolt face enhances accuracy.
With an AR-15, what impact does the bolt/bcg have on accuracy with many companies selling premium bcg’s? Now that is a great question. I'm all ears.
"Group think" is not thinking. It is the lack of independent thought. It is a cancer of the mind.
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Re: BCG impact on accuracy?
[Re: scot]
#9079804
07/22/24 01:18 PM
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Joined: Jul 2012
Posts: 16,317
603Country
THF Celebrity
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THF Celebrity
Joined: Jul 2012
Posts: 16,317 |
That is a good question. I’m interested too.
Not my monkeys, not my circus...
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Re: BCG impact on accuracy?
[Re: scot]
#9079896
07/22/24 03:43 PM
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Joined: Jul 2021
Posts: 1,048
DustyArmadillo
Pro Tracker
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Pro Tracker
Joined: Jul 2021
Posts: 1,048 |
Don’t have a real experiment to point to but…
I bought a young manufacturing BCG for my “sniper” AR and that gun is super accurate with factory ammo.
The barrel is aftermarket. (Douglas)
Figured if it wasn’t accurate there was nothing more I could change.
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Re: BCG impact on accuracy?
[Re: scot]
#9079941
07/22/24 04:36 PM
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Joined: Sep 2022
Posts: 671
duffas
Tracker
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Tracker
Joined: Sep 2022
Posts: 671 |
'Premium' applies to coating, correct dimensions of parts, gas leaks, etc. Chamber/barrel/alignment are more important. It's a pressure cap on the end of the barrel. It's movement variations are more important.
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Re: BCG impact on accuracy?
[Re: duffas]
#9079982
07/22/24 05:18 PM
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Joined: Apr 2019
Posts: 1,182
Wilson Combat
Boar Meister
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Boar Meister
Joined: Apr 2019
Posts: 1,182 |
The only way we've seen a BCG effect accuracy is when the gas key ID and the OD of the gas tube aren't lined up correctly. As duffas mentioned, premium refers to things like:
Material, 9310 bolts are the best and are stronger than Mil-Spec Carpenter 158 Dimensional tolerances Coatings
Accuracy of an AR is pretty much determined by the bore and chamber quality of the barrel. Quality barrels will have bores that have been honed prior to rifling, have been double stress relieved and chambered properly on a CNC machine for consistency. Run of the mill barrels have had the bore hone and stress relieve steps skipped.
Ammo can have an effect on accuracy in an AR too. When a round is chambered in an AR while firing (this is a pretty violent action) the bullet can actually be slightly bent out of alignment having a negative effect on accuracy. We've seen this the most with the 350 Legend caliber due to its rough feeding. I've personally experienced loads that will shoot sub 1" in bolt guns that won't shoot much under 2" in an AR with both having the same bore spec..
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Re: BCG impact on accuracy?
[Re: Wilson Combat]
#9080110
07/22/24 09:26 PM
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Joined: Jul 2014
Posts: 6,744
onlysmith&wesson
THF Trophy Hunter
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THF Trophy Hunter
Joined: Jul 2014
Posts: 6,744 |
The only way we've seen a BCG effect accuracy is when the gas key ID and the OD of the gas tube aren't lined up correctly. As duffas mentioned, premium refers to things like:
Material, 9310 bolts are the best and are stronger than Mil-Spec Carpenter 158 Dimensional tolerances Coatings
Accuracy of an AR is pretty much determined by the bore and chamber quality of the barrel. Quality barrels will have bores that have been honed prior to rifling, have been double stress relieved and chambered properly on a CNC machine for consistency. Run of the mill barrels have had the bore hone and stress relieve steps skipped.
Ammo can have an effect on accuracy in an AR too. When a round is chambered in an AR while firing (this is a pretty violent action) the bullet can actually be slightly bent out of alignment having a negative effect on accuracy. We've seen this the most with the 350 Legend caliber due to its rough feeding. I've personally experienced loads that will shoot sub 1" in bolt guns that won't shoot much under 2" in an AR with both having the same bore spec.. Good stuff.
An unethical shot is one you take, that you know you shouldn't.
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Re: BCG impact on accuracy?
[Re: scot]
#9080310
07/23/24 11:53 AM
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Joined: Jun 2009
Posts: 4,263
Korean Redneck
Extreme Tracker
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Extreme Tracker
Joined: Jun 2009
Posts: 4,263 |
This was good info. I've wondered this one myself over the years. Good to know cause I like to know where I can cheap out when need be.
I'm a dude who likes long barrels!
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