FWIW, back when I shot lots of IPSC, I always used Winchester small rifle primers in my .38 Super reloads. Major power factor was 175 then, and most of us ran at or above 180. I was shooting mostly 124 gr. jacketed bullets at about 1450 fps. Small pistol primers would always flow, and fairly often pierce at that pressure level, but the small rifle primers barely cratered. Small rifle primers are the ONLY way to go with factory-level 9x23 loads, which run at rifle pressures.
|