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"That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892
"The body cannot go where the mind has not already been."
My BCG's are all very slick in the upper when I cycle it. They lapped themselves in. I saw your thread and it looks like you were polishing a BCG that was finished with Rhinoliner or something (That LMT). Anyway, yes, I have run very slick setups (RCA bcg is EXTREMELY slick/hard), and it didn't do anything special regarding ejection pattern. Yes, I know ejection pattern means squat, but when it moves forward/back, you know something has changed. The RCA BCG did not move the pattern over a phosphate carrier.
"You people have too much time on your hands." - scottryan
Yes, LMT chose a rock-and-gravel finish for their gen4 BCGs. The RCA is very slick with their nitride finish.
I have found that friction matters just as much on the return-to-battery stroke as it does on recoil....if not more so. My brother's ejection pattern didn't change either prior to polishing...but it went from being borderline using Brownells Mags w/ a MP follower to working 100% with margin for being dirty and dry on older MIL magazines that had green followers and gawdnknowshowold springs in them.
Results is results.
"That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892
"The body cannot go where the mind has not already been."
I've heard a lot from Pat Rogers about it not running PMC .223, etc. in his classes. I'm referring to the 14.5" version with 0.078" gas port (alleged).
Also, I am sure it matters button vs. hammer forged, as the hammer forged barrels will have more back-pressure than the button-rifled, likely. Bore characteristic matters just as much as port characteristic. So I guess each is its own beast almost. I just know that BCM picks smaller (on average) ports, and warns against using anything but 5.56 in their 14.5" middy.
Last edited by WS6; 04-23-14 at 12:02.
They do issue this warning. I think this is more to cater to the TOS crowd who'll run it bone-f*cking-dry with 400rds of tula and then bitch to the high heavens when they get a malf....and post pix. KAC fought the same battle before opening the GP's on their SR15's.
And that is an interesting observation regarding bore characteristics. It makes sense to me. Better gas seal means more pressure for the system to function.
And, yes, the bottom line is that each gun is kinda its own beast. I certainly do not recommend running a 7-point-something ounce buffer in a BCM 14.5" middy...but I had it laying around and my bro said "WTH, let's try it" and it worked. I rec like Mark the H2 for most BCM carbines.
"That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892
"The body cannot go where the mind has not already been."
Indeed. This is the issue with comparing middys and whatnot with regard to buffers.
I could take a Daniel Defense with 0.076" port and compare it to a Centurion Arms with a 0.076" port, and the tapered bore of the Centurion Arms would give me different results. It's a system. It's impossible to cross-compare systems, I am learning, because when I say "Hey, Buford, what buffer runs in your BCM and how big is the port?" and you tell me, and then I try to do the same thing with another manufacturer's barrel, it may or may not work. So really, it's almost mental masturbation to try this.
One needs to stick with the same barrel manufacturers and port dimensions to properly compare these things. Then you even have port variances, such as Daniel Defense chamfering their gas-port. This will affect flow velocity, of course.
Really, this thread seems more about "general concept" than "recipe", and the more I look for "recipe", the more I am reminded of the story of the young man who asked the Guru who was wading in the pool "Is it cold or warm?" and received a bucket of water over the head in answer.
Speaking of that, I know your BCM Middy 14.5 worked great with H3 and Wolf. Then it began choking at around 1K rounds and you had to buffer down to an H/Carbine. I also recall something about gas-tube wear. Is your rifle back to functioning with H3 and Wolf, or was that a 1-time deal early in its life never to happen again? I ask, because I simply cannot fathom a system changing that much and not being "broken" somewhere.
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