Don't know if this is the right place for this, but ...Went to the range today with my Ruger Blackhawk 9mm/.357 convertible. Shot .38 reloads, no problem, but about half of the .357 reloads exhibited a pierced primer. I was using 158 gr jhp over 7.4 grs of Herco. Primers were Remington small pistol 1 1/2. Had similar problems using the same bullet over 10.0 grs of Blue Dot and Magtec 1 1/2 SP primers. Loads DO NOT call for mag. primers, and are from the most current Lee manual. Could it be the pistol, a weak spring maybe? My primer choice? The load? Thanks for any input!