Primers

I had a good supply of SR primers and wanted to use them in pistol reloads.  I too tested them to see if the velocities were any different.  They were the same as the same brand in small pistol primers. I started loading them in 9mm, 40, and 38 spcl/357 Mag brass.   The only problem I've had so far is they don't go off reliably in my striker fired guns. I get maybe 1 or 2% that don't go off.  They have always worked in my hammer fired guns.  These guns are S&W 586 and Browning Hi Power .  I had misfires in a Ruger LC9 and S&W M&P.  Another shooter friend who shoots a striker fired pistol had similar results with misfires.  Not many but maybe one or two per hundred.  He was satisfied with the occasional misfire as he likes to train for malfunction practice and gets some real world malfunctions.  When shooting in competitions, he uses only pistol primers and has no problems.  

The only test I've done with large rifle primers in large pistol cartridges has been in the 45 auto 1911 pistol.  Being a hammer fired gun, it has worked perfectly.    

So far, I've noted that Federal SR primers are the most reliable in striker fired guns and Sellier & Beloit SR primers were the worst as far as mis fires. 

My Ruger LCP pro 9 MM has a lot of rounds through it and when I found misfires with the SR primers I installed a new striker assembly which had a new spring on it   It made no difference as far as misfires.  

Tom Gray