I have a 21 in. contender barrel in 22-k-hornet. i shoot 35gr. v-max. w-296. and yes, small pistol primers. into smaller groups than some say is possible with a hornet, or a brake open carbine. on perfectly still days it will do an inch at 200 yards, if i do my part. the small pistol
primers gave less variation in velocity. they showed no signs of pressure, even when pushed to 3200 fps.(considering hornadys factory load for regular hornet is 3100) i feel comfortably with 3200 in an improved chamber. I never worked with the regular hornet, BUT SURE LOVE MY(K)
COOPERSHOOTER