Need some info. New .40 S&W Performance Center shooting 3 inches low at 7 yards. Shooting reloads: 155 gr LSWC. Tried two loads: 5.4 grs and 6.0 grs of HP38 (same results for both). 5 inch barrel. Federal 100 primers with Federal brass, fairly heavy crimp. OAL 1.129. I thought it was my but my son achieved same results. Fellow shooter had factory loads and they were right on bullseye.
Does the gun not like HP38, 155 gr LSWC, Federal primers, Federal brass, the heavy crimp, or all of the above.
Thanks in advance for any help.