Just wanted tell my experience with these primers. I had loaded about sixty 38 specials the first thirty were loaded with Federal primers the remainder with the SA primers. The Rounds loaded with Federals all fired successfully, with the SA primers I had two or three ftf in every cylinder. They all fired on the second try but two ftf after repeated tries. Now I have to figure what to do with the 300 rounds I have loaded with these. I was using my GP100.