Page 20 of 25 FirstFirst ... 101819202122 ... LastLast
Results 191 to 200 of 245

Thread: What buffer are you running in your middie?

  1. #191
    Join Date
    Oct 2007
    Posts
    6,611
    Feedback Score
    11 (100%)
    Quote Originally Posted by BufordTJustice View Post
    I had Clint ("Slash") at HeavyBuffers.net make me a custom 8.3oz SS bodied carbine buffer with 3 tungsten weights inside. I ran it 100% with a springco WHITE and a stock Colt Carbine spring on my BCM 14.5" middy with not a single issue. For the buffer to cause return-to-battery issues, it would almost have to be a solid chunk of stainless and weight north of 10oz I would imagine....which is just ridiculous.

    Also, the A5 buffers are FAR heavier than carbine buffers and the Rifle/A5 spring provides less pre-load pressure, yet they have no issues running 6.8oz A5H4 buffers. Food for thought.

    EDIT: I changed the weights and it now weighs just over 7oz. My brother uses this in his BCM Middy with a Springco WHITE without issue. Has has over 400 rounds on this exact setup.
    Wow! So what's this I hear about BCM's middy being ammo sensitive if it's taking 200% heavier buffers than "normally" run in middys?

  2. #192
    Join Date
    Apr 2009
    Location
    FL -Where it's summer 10.5 months out of the year
    Posts
    4,114
    Feedback Score
    17 (100%)
    Quote Originally Posted by WS6 View Post
    Wow! So what's this I hear about BCM's middy being ammo sensitive if it's taking 200% heavier buffers than "normally" run in middys?
    Friction.

    See my BCG polishing thread (that turned into a complete shitstorm). I polished his BCG as instructed and VOILA.....it runs like butter even with PMC bronze, tula, and wolf.
    "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."

  3. #193
    Join Date
    Oct 2007
    Posts
    6,611
    Feedback Score
    11 (100%)
    Quote Originally Posted by BufordTJustice View Post
    Friction.

    See my BCG polishing thread (that turned into a complete shitstorm). I polished his BCG as instructed and VOILA.....it runs like butter even with PMC bronze, tula, and wolf.
    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.

  4. #194
    Join Date
    Sep 2007
    Location
    AZ
    Posts
    27,214
    Feedback Score
    14 (100%)
    Quote Originally Posted by WS6 View Post
    Wow! So what's this I hear about BCM's middy being ammo sensitive if it's taking 200% heavier buffers than "normally" run in middys?
    The BCM middy isn't really ammo sensitive. I'm running two with no problems with .223 and 5.56. Now if you run a lot of WOLF under powered stuff... a muzzle device with expansion chamber or lighter buffer are helpful.
    "You people have too much time on your hands." - scottryan

  5. #195
    Join Date
    Apr 2009
    Location
    FL -Where it's summer 10.5 months out of the year
    Posts
    4,114
    Feedback Score
    17 (100%)
    Quote Originally Posted by WS6 View Post
    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.
    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."

  6. #196
    Join Date
    Oct 2007
    Posts
    6,611
    Feedback Score
    11 (100%)
    Quote Originally Posted by BufordTJustice View Post
    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.
    Thanks, very interesting!

  7. #197
    Join Date
    Oct 2007
    Posts
    6,611
    Feedback Score
    11 (100%)
    Quote Originally Posted by markm View Post
    The BCM middy isn't really ammo sensitive. I'm running two with no problems with .223 and 5.56. Now if you run a lot of WOLF under powered stuff... a muzzle device with expansion chamber or lighter buffer are helpful.
    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.

  8. #198
    Join Date
    Apr 2009
    Location
    FL -Where it's summer 10.5 months out of the year
    Posts
    4,114
    Feedback Score
    17 (100%)
    Quote Originally Posted by WS6 View Post
    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.
    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."

  9. #199
    Join Date
    Oct 2007
    Posts
    6,611
    Feedback Score
    11 (100%)
    Quote Originally Posted by BufordTJustice View Post
    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.
    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.

  10. #200
    Join Date
    Oct 2007
    Posts
    6,611
    Feedback Score
    11 (100%)
    Quote Originally Posted by markm View Post
    Ok. H2 is standard in my eyes. H1 on a borderline under-gassed weapon. I don't mess with CS springs at all.
    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.

Page 20 of 25 FirstFirst ... 101819202122 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •