I merely by coincidence developed a load into cases with small primer. Fed. small pistol primer, Longshot powder 8gn and 185gn Berry FMJ-hollow base. Good recoil, clean burn, minimal flame, if any and pretty consistent. It's funny, things change quiet bit when I use the regular large primer cases, them I have to start reducing powder charge and even when the accuracy is good, it is not as good as with those small primers