16” 6.5 creedmoor?
- By Gtscotty
- Semi-Automatic Rifles
- 72 Replies
The 308 with hybrid cases runs higher
BC bullets faster than the 6.5 CM with brass cases... fact.
200 SMK to 230 gr Atips are much higher BC than anything available in 6.5.
It's the same hybrid case as the 277 Fury hybrid case which runs similar velocity as the 270 WSM in a necked down hybrid 308 case.
The 270 WSM, and the 277 hybrid have more velocity than the 6.5 CM with high BC bullets.
So one can apply hybrid cases to the 6.5 CM to bring up it's ballistic potential.
The hybrid cases in the creed are definitely fun to play with. .308 hybrid cases are a lot easier, no neck turning, I have some worked up to use for normal high end .308 loads because my mid gas SFAR (like all mid-gas .308s I've had in the past) unlocks early and tears up cases at relatively low charge weights. A longer gas system is the real fix, but I like the SFAR enough that Hybrid cases are worth a try, especially since American Reloading has them for a good deal so often.
Any of y'all with these shorter length barrels & gas systems having or had functioning issues ie cycling, ejecting, feeding etc?
I have built two of these now - one in 308 and one in 6.5.
Both run 16" barrels.
308 is Wilson Combat Recon barrel, intermediate gas.
6.5 is custom spec X-Caliber, mid length gas.
Have broken 2 ejectors on the 308 in less than 200 rounds, shooting mostly factory 155 Norma.
6.5 is having ejection issues and showing signs of overgas when the block is almost fully closed.
Running sprinco Orange and KAK heavy carbine buffer.
I'd expect a mid-gas 6.5 to be rough any way you cut it, but are you using AGBs on these uppers? (Edit, nevermind, missed the part about the gas block being nearly closed on the 6.5)