BCM barrel accuracy.

[GTF425]

My 2014 BCM with a 14.5 BFH was a solid 1.5" @ 100y rifle. Latest BCM (an FSB 14.5 BFH) is around 3" at 100y.

For comparison; I have a Colt SOCOM barreled upper with a 13" MCMR that consistently shoots 50-5X on a B-8 at 100y with 62gr Magtech.

I love the MCMR handguard, but will not be purchasing complete BCM uppers as I can get a more accurate barrel elsewhere.

[Vegas]

For reference the SS410 I spoke about above was bought in 2014. Did something change in BCM’s supply chain/ manufacturing processes where more recent examples have more issues?

[Lawnchair 04]

Sample size of 1 but my BCM ss410 16 inches that I bought new in 2011 holds 1 moa with good ammo and I don’t consider myself a good precision shooter. This is at 100 yards at an indoor range from a bench with privi 75grain, older SSA mk262, and while working up a Markm based handload with 8208xbr and a 75gr Hornady match bullet. The results were repeatable with me being the only shooter.

[Stickman]

My 2014 BCM with a 14.5 BFH was a solid 1.5" @ 100y rifle. Latest BCM (an FSB 14.5 BFH) is around 3" at 100y.

For comparison; I have a Colt SOCOM barreled upper with a 13" MCMR that consistently shoots 50-5X on a B-8 at 100y with 62gr Magtech.

I appreciate the info, but we really need to know what ammo you are shooting, and what optic to get those 3" groups. Without that we are trying to figure if you shoot Wolf ammo to get there....

[Sry0fcr]

I have nothing to add besides another datapoint. I just needed to re-zero after a battery change... 5 shot group (7th of the evening) Colt 6960 w/G2S, RMR09, Lake City XM193 @50y.

Seems like this BCM accuracy thing has been talked about for a while. I'm curious as to what expectations folks have for a "mil spec" carbine? Is this a case of better being the enemy of good enough or does BCM have an issue?

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[GTF425]

I appreciate the info, but we really need to know what ammo you are shooting, and what optic to get those 3" groups. Without that we are trying to figure if you shoot Wolf ammo to get there....

As noted.



It's sad when your secondary could probably group tighter.

[jpmuscle]

As noted.
It's sad when your secondary could probably group tighter.

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[Wake27]

I have nothing to add besides another datapoint. I just needed to re-zero after a battery change... 5 shot group (7th of the evening) Colt 6960 w/G2S, RMR09, Lake City XM193 @50y.

Seems like this BCM accuracy thing has been talked about for a while. I'm curious as to what expectations folks have for a "mil spec" carbine? Is this a case of better being the enemy of good enough or does BCM have an issue?

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Talked about, definitely. But GTF425’s post above is maybe the only target I’ve ever seen so it’s the only post that actually has meaning. There are a few members I’d probably believe without seeing, but achieving MOA isn’t nearly as easy as most posts make it sound, so either I just really suck or a lot of people are full of it.


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[Vegas]

...but achieving MOA isn’t nearly as easy as most posts make it sound, so either I just really suck or a lot of people are full of it.

Shooting small groups with a good barrel is not overly difficult, just requires being a bit methodical and patient. All the info is out there to be successful. A decent trigger helps. The group below was with a G2S.

[DoubleW]

My 11.5” BCM upper is a solid 2.5-3 MOA performer with an Aimpoint PRO and M193 and I’m perfectly happy with that