Anyone have a 6.8 reamer that they could let me borrow? I will be happy to pay a fee with cash or mags!
I am new to the 6.8 game and picked up an older 10.5" upper with a SAAMI-spec chamber. I would like the flexibility to run the tactical SSA ammo so I need to ream this chamber.
The reamer is harder, no scatch that A LOT harder than the chrome. It does remove a little from the neck and throat to bring it to SPC II specs. FWIW as someone who bore scoped a few dozen barrels with more than 1-5K rounds on them I’ve noticed the chrome is gone in the neck and throat just from shooting. Not so on BCM BFH barrels, and Noveske N4 hammer forged barrels, also notice that those two brands don’t need reaming nor does Colt. Some companies know how to make barrels properly others…well not so much.
Pros:
Gun works
No popped primers
No extraction problems
Gun with functions with all available ammo
Cons:
1.Slightly less accurate, due to a looser neck and throat which is the exact same reason why 5.56mm NATO chambers are less accurate than .223 Rem MATCH chambers. Super tight accuracy or reliability it’s your choice.
If you’re shooting an Aimpoint or a low powered scope (1-6x) you’re not going to notice the decreased accuracy at all.
I even reamed my stainless 16" midlength 1x11 twist WOA barrel on my 6.8 SPC Hunting AR. After reaming FF’d with with a VTAC/Troy TRX 11" rail and a Leupold 1-4x scope in a Bobro mount it shoots just a tad over .75" groups at 100yds with SSA 110gr Barnes TSX rounds and my AAC .30 cal Cyclone suppressor and .85" groups with nothing on the muzzle. I shot it for groups with that scope but an Aimpoint C3 lives on that gun now. I might have even done better with a higher powered scope.
Did I mention that gun works and works with all available ammo?