STAT,
I'VE BEEN USING 7400'S OR THEIR KIN(740,742,4) FOR MANY YEARS. WITH REFERENCE TO YOUR HANG UP POST SECOND SHOT... WHAT TYPE OF AMMO ARE YOU PUTTING THROUGH IT? HANDLOADS, FACTORY? SECONDARILY, WHAT TYPE OF CARTRIDGE, I.E. PSP'S, BALLISTIC TIP, ETC? I FIND THAT IN THE ABSENCE OF A REALLY FILTHY CHAMBER, THE PROBLEM IS USUALLY THE CARTRIDGE TYPE. TRY BALLISTIC TIP AMMO AND NOTHING HOT LOADED.