bugman Posted March 14, 2023 Report Share Posted March 14, 2023 Got another 308 build that I started and couldn't finish, or couldn't get right (yet). I think I've got most of the low-hanging fruit on this one, but I'm missing something, that's for sure. Here's the waterboarding info: Armalite AR10 recoil system? NO Buffer weight: 5.36 oz Buffer length: 5.296" Extension buffer tube internal depth: 9-5/8" measured (Aero) Buffer spring: Armalite EA-1095 (13-5/8" length, 34 coils) Gas system length: rifle Gas tube length: 15-1/8" Photo in Magwell Photo of bolt face BCG clearance at ears: PLENTY / BCG clearance at bolt stop: 0.10" Gas journal diameter: 0.750" / Gas port diameter: #48 drill bit GOES (.076), #47 DOES NOT GO (.078) Description of malfunction: weak ejection (like less than a foot, but the brass is getting out), and bolt never holds open on last round (multiple known-working magazines tested) Additional information: Criterion barrel M118LR, 18" rifle gas, 1-10T, chrome lined Lantac Enhanced BCG with Aero Precision bolt (I have read in this forum that people have had issues with the Aero Precision bolt catch being too short for this carrier, but not sure if that's what is going on here) Shooting Hornady #80971 Black 308 Win 168 Gr A-Max What do y'all think about it? Greatly appreciate any help. Quote Link to comment Share on other sites More sharing options...
shooterrex Posted March 14, 2023 Report Share Posted March 14, 2023 Pretty sure your gas port is too small. Quote Link to comment Share on other sites More sharing options...
bugman Posted March 14, 2023 Author Report Share Posted March 14, 2023 9 minutes ago, shooterrex said: Pretty sure your gas port is too small. I thought that might be the case. Any idea what it should be? Am I anywhere close? Quote Link to comment Share on other sites More sharing options...
shooterrex Posted March 15, 2023 Report Share Posted March 15, 2023 That's a 98Z question. He's the gas port whisperer. Quote Link to comment Share on other sites More sharing options...
bugman Posted March 15, 2023 Author Report Share Posted March 15, 2023 1 hour ago, shooterrex said: That's a 98Z question. He's the gas port whisperer. Got it. I'll shoot him a message. Thanks! Quote Link to comment Share on other sites More sharing options...
Matt.Cross Posted March 15, 2023 Report Share Posted March 15, 2023 On 3/14/2023 at 10:17 PM, bugman said: Got it. I'll shoot him a message. Thanks! Let's hope he reads that before he sees your response to @unforgiven in the other thread... Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 15, 2023 Report Share Posted March 15, 2023 (edited) 8 hours ago, bugman said: Gas journal diameter: 0.750" / Gas port diameter: #48 drill bit GOES (.076), #47 DOES NOT GO (.078) Description of malfunction: weak ejection (like less than a foot, but the brass is getting out), and bolt never holds open on last round (multiple known-working magazines tested) Additional information: Criterion barrel M118LR, 18" rifle gas, 1-10T, chrome lined What do y'all think about it? Greatly appreciate any help. I think your gas port diameter is way too fukkin' small for that barrel config. There's my $0.02. You gonna go off on me now, like one of your other posts earlier?... I'll wait... Don't send me a PM, man - if you're gonna act like you did in that other thread. Don't even waste your time doing it. Edited March 15, 2023 by 98Z5V Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 15, 2023 Report Share Posted March 15, 2023 3 hours ago, Matt.Cross said: Let's hope he reads that before he sees your response to @unforgiven in the other thread... Too late - I read that shiit-show first. Quote Link to comment Share on other sites More sharing options...
bugman Posted March 15, 2023 Author Report Share Posted March 15, 2023 4 hours ago, 98Z5V said: I think your gas port diameter is way too fukkin' small for that barrel config. There's my $0.02. You gonna go off on me now, like one of your other posts earlier?... I'll wait... Don't send me a PM, man - if you're gonna act like you did in that other thread. Don't even waste your time doing it. Why would I go off on you? You haven't done anything but help me, so far. Quote Link to comment Share on other sites More sharing options...
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