I'm not sure if this belongs in reloading! Anyway: Two sets of five rounds shot on 18 November through a 23.5" barrel BRNO ZKK 600. Bullet seated on cannelure and crimped with Lee Factory Crimp die. BOTH with 55.0 grains H4831 and Hornady 150 grain Interlock bullet:

REMINGTON 9 1/2 PRIMER: 2799fps, 2846fps, 2784fps, 2859fps, 2730fps.

CCI LARGE RIFLE: 2803fps, 2801fps, 2801fps, 2831fps, 2811fps.

So a slightly higher velocity and a lesser spread with the CCI. But at the same time the CCI showing greater signs of whatever pressure there was than the REMINGTON.