Strange but true, regarding my older .45cal AMT! Although I have had great success with new style mags., such as Tripp and Wilson, the Hornaby critical defense ammo chambers, fires and ejects essentially 100% of the time even with a stock mag. Now this gun is very finicky and like many .45s was designed to fire ball type ammo. Other internet posts note that most problems with the AMT are failure to fully lock into battery. I figure that it somehow lilkes the more traditional bullet shape of the Hornaby round over the bulbous shape of the standard ball ammo. What do you think? Thanks!