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[QUOTE=chris
The problem with shorter barrelled AR carbines is not so much the bullet weights or powder load, you just can't really get around the loss of velocity due to the shorter barrels....

An adjustable gas block will also help if you are loading them up hot, combined with the suppressor also increasing pressure. Just that bit nicer to shoot.
Guessing its a mid-length gas system on...

I would take a punt that your best accuracy is around your couple of nodes of lower ES. Others might be able to provide more information there.

You're the first person I've come across not too...

Bought a 1000 77smk for multigun as cheap, haven't tested at distance but looked really tight as on a short range when zeroed. Think I might save them as feels a bit wasted on muitigun.
Have you...