That is because the large pistol primer has a stronger ignition on the powder charge. Felt recoil was different with some of the loads that read 100 FPS difference or so. You can also see that there is a difference between a 3” and 5” barrel and different guns with the same barrel ...
CCI 300 Large Pistol Primers - 1000ct OEM I have used 200 of these primers and they did the job perfectly - every primer has worked Was this review helpful? Yes Report Share 2 years ago JC Verified Customer James C Missoula, United States ...