Correct buffer size

[texas_law_dog]

Any definitive source on selecting correct buffer size for various caliber and length combinations? Does 6.8 SPC (not SPC II) with a rifle length gas system require the same buffer as .556 rifle length?

[spfabrication]

I like to use the heaviest buffer that will allow the bolt to lock back after last round with the weakest ammo I will be shooting from that platform.

[AreWeFree]

Doesn't matter for semi auto, if the rifle functions correctly don't mess with it.

If you're trying to tune the gas system perfectly, run an adjustable bcg or gas block and a carbine or h buffer.

[Unbekannt]

I like to use the heaviest buffer that will allow the bolt to lock back after last round with the weakest ammo I will be shooting from that platform.

Bingo!

But, if you are in any, slight doubt, call the heavy metal masters at Sprinco

http://www.sprinco.com/

And tell them your set up, you ejection pattern, and how your recoil feels. I did and they recommended a fix which is just super for me.

[BigPimping]

Another vote for sprinco......

[texas_law_dog]

Thanks all.