Re: Am I going to regret selling my AAC upper?
Posted: Tue Apr 12, 2016 2:47 pm
Okay, so I did quite a bit of testing this AM at the range that is closest to me, and I was able to switch between the AAC upper and the BCM upper.
This is what I tested with;
H1, H2 & JP 15 Captured Buffer.
220 grain subsonic hand loads (sierra matchking)
110 grain supersonic hand loads (nosler 110 varmint)
110 grain Barnes Vortex Supersonics
220 grain Sig Sauer subsonics.
All ammunition other than the 110 grain nosler factory handloads functioned perfectly in all configurations (both with and without my Saker attached) on both uppers with both the H1 & H2 buffers. With the JP captured buffer sometimes the bolt would not lock back with the Vortex but I don't plan on running that buffer so not a big deal.
The 110 Nosler handloads (loaded with 18 grains of H110) functioned fine w/out the suppressor but with the suppressor attached they would fail to cycle fully, causing the next cartridge in the magazine to get hung up in the chamber. They would lock the bolt back if fired as last round on a mag... so, not sure what's going on there.
More importantly, the above failure which happened with the BCM upper was reproduced on the AAC upper by swapping in the same lower, charging handle and bolt carrier. I did not have the AAC bolt carrier with me so I can't say it is impossible that it might have handled this combination okay.
At this point I'm pretty well convinced that the BCM is functionally equivalent to the AAC upper for my intended purposes... with the main challenge now being to tune my 110 handload so that it functions better suppressed.
Pretty impressed with the BCM and I think I'm going to be okay with letting the AAC upper go complete and using the funds for a different 300 BLK project at some later date.
Thanks for everyone's advice/thoughts & input.
This is what I tested with;
H1, H2 & JP 15 Captured Buffer.
220 grain subsonic hand loads (sierra matchking)
110 grain supersonic hand loads (nosler 110 varmint)
110 grain Barnes Vortex Supersonics
220 grain Sig Sauer subsonics.
All ammunition other than the 110 grain nosler factory handloads functioned perfectly in all configurations (both with and without my Saker attached) on both uppers with both the H1 & H2 buffers. With the JP captured buffer sometimes the bolt would not lock back with the Vortex but I don't plan on running that buffer so not a big deal.
The 110 Nosler handloads (loaded with 18 grains of H110) functioned fine w/out the suppressor but with the suppressor attached they would fail to cycle fully, causing the next cartridge in the magazine to get hung up in the chamber. They would lock the bolt back if fired as last round on a mag... so, not sure what's going on there.
More importantly, the above failure which happened with the BCM upper was reproduced on the AAC upper by swapping in the same lower, charging handle and bolt carrier. I did not have the AAC bolt carrier with me so I can't say it is impossible that it might have handled this combination okay.
At this point I'm pretty well convinced that the BCM is functionally equivalent to the AAC upper for my intended purposes... with the main challenge now being to tune my 110 handload so that it functions better suppressed.
Pretty impressed with the BCM and I think I'm going to be okay with letting the AAC upper go complete and using the funds for a different 300 BLK project at some later date.
Thanks for everyone's advice/thoughts & input.