I used small rifle primers in .38Super Auto for USPSA, thousands of them. 124gr HAP @ 1350-1400fps, no problems.
I read somewhere that with the .38 Super, using SRP was a common practice. Did you find that to be the case?
When .38 Super first came into use in USPSA, or IPSC, the power factor to make major was higher. SRPs were used by most if not all in loads that were pushing 1500 fps. Then comps came along and even though the power factor was reduced, comps love pressure, so we still loaded .38 Super hot. I stopped shooting my race gun regularly, but when I do, I love the look on people's faces when a fully loaded .38 Super goes off with hot gas screaming out of the comp and steel targets going down most emphatically.
