Looking for something a bit shorter than my current hog setup.
I have a CMMG MK3 CBR 16" with YHM Phantom 30 QD, it wears a SWFA 1-4x scope in LaRue mount. I run the ERGO F93 stock completely collapsed. I have a pretty short length of pull. So with the 8.5" can hanging off the end of a 16" barrel the rifle is pretty unbalanced. Very front heavy.
Currently with stock fully collapsed and suppressor attached the gun is 39" over all length.
Pros for the 308:
I already own the platform so I could pay $200 for stamp and buy the 12.5" CMMG Barrel, 11 MK3 CMMG Keymod Rail, Adjustable gas block, and mid length gas tube all for around $550.
308 hits harder than the 300BLK even in the 12.5" config it will still push the 168's at around 2350FPS
I'm already setup to reload this caliber
Cons for the 308:
Muzzle blast, don't know how that will equate to sound suppression. Yes my suppressor is rated for it all the way down to 10.5" barrels
12.5" barrel would only save me 3.5" of barrel over the current 16" I don't know if that is worth $550 to me
Weight at around 12 pounds with suppressor
Other option was thinking of selling the CMMG since I wouldn't really have a use for it anymore and build a new 300BLK SBR. Would change the SWFA scope over and would still have my bolt 308 for longer ranges if need be. Priced it all out and looks to be around $1300 with stamp to get it built.
Pros for the 300BLK:
Round was meant to be shot suppressed out of a short barrel
With the 8" barrel and suppressor attached I'm looking at 29" over all length, which is pretty dang short
Cycles subsonic rounds, with the new bullets made to expand at subsonic speeds this makes it enticing
Cons for the 300BLK:
Round isn't a show stopper
Not setup to reload the round so will add even more costs to the build
Not sure the effective distance of a 8" barrel with this caliber
What would you guys do?