DWalt
Member
Some years ago I did a brief comparison between identical .45 loads, differing only in primer size. I think I used SR primers vs. LP primers. Not extensive testing, but clearly there were no significant differences in MV and grouping between them.
Originally, the small primers were used to distinguish between conventional and Lead-free .45 ammunition. I don't know if that is still the case. I load and use both sizes, I just segregate cases by primer pocket size. . Some believe that the small primers are better suited for use with high pressure .45 loads in any event, I really don't care which size primers I shoot. I generally use SRPs ito load all handgun cases having small primer pockets.
Originally, the small primers were used to distinguish between conventional and Lead-free .45 ammunition. I don't know if that is still the case. I load and use both sizes, I just segregate cases by primer pocket size. . Some believe that the small primers are better suited for use with high pressure .45 loads in any event, I really don't care which size primers I shoot. I generally use SRPs ito load all handgun cases having small primer pockets.