How fast are the 160 AB's leaving the muzzle?

Have not had a problem with them to 600 yards from the 7 RM and the Mashburn.

One MOA is about 6" at 600 yards. That much variation could get lost in the noise . How accurate is brother's rifle?




The 280 Remington is overbore.

The 7 Rem Mag is over bore.