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Posted: 6/20/2017 2:00:59 PM EDT
[Last Edit: 6/20/2017 2:03:48 PM EDT by bmo419]
Starting a new build and recently bought a Ballistic Advantage 5.5" barrel from the EE here. Barrel already had some work to the feed cone done by Macon Armory by one of the previous owners. So that was a plus for me.

Did a plunk test on a number of different style bullets I had on hand both factory and for my own reloads. Had a number fail from both the factory rounds I tried and my own ammo.

So clearly the throat is way short. Anyone have a recommendation on a gunsmith who can finish ream the throat to SAAMI specs? I figure it's cheaper than buying another barrel and I'm not about to sell it and have someone else have the same issue. I'd buy a reamer and do myself but I figure a gunsmith can do it better and probably cheaper.




More info for those so inclined:
To check how short the throat was, I took my bcg from my other build, placed a round in the bcg, then attempted to simulate chambering with the barrel (basically just bringing the two together). Bullets hit the rifling and the bcg would not fully butt up against the barrel chamber face. Some had a gap anywhere between 1/8" or less. A few examples, Magtech 115gr round nose, had a huge gap between bcg face and chamber face, round measured at 1.150" oal. S&B 115gr RN slightly smaller gap but still wouldn't close, round measured about 1.155". My 124gr RN would close if seated to 1.140" or less. Some of my 124gr FP, ~1.075" OAL, decent sized gap. Federal 124gr HST huge gap, forgot to measure OAL. All these rounds work fine in my handguns, CZ Scorpion, and my other AR9 with a 16" Faxon.

Thanks
Link Posted: 6/20/2017 6:23:43 PM EDT
Give Rudy a call and inform him of the problem...............he should be able to help, I consider him a Guru when it comes to PCC stuff.............he really got me up and making noise..............
Link Posted: 6/20/2017 6:40:13 PM EDT
Link Posted: 6/21/2017 11:12:58 AM EDT
Thanks guys. I'll contact Rudy.
Link Posted: 6/21/2017 6:41:57 PM EDT
[Last Edit: 6/21/2017 6:46:51 PM EDT by Mad-Machinist]
Link Posted: 6/22/2017 11:37:12 AM EDT
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Originally Posted By Mad-Machinist:
Send it in....I can re throat ...send a sample of the ammo you are having issues with. With the gap described.....it might be a casualty of a worn chamber reamer when it was made......it happens.....that is why I went to exclusive use of carbide reamers.....do they cost more...HELL YES, but I get 4 x the number of barrels before resharpening is necessary....except when I screw up on a custom barrel and shatter a brand new reamer like I did today........Haven't done that in years.......
Rudy
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Sent you an email for the particulars through here Rudy. Thanks!
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