Hi everyone. I reloaded some 45 acp +p small primer cases with 7 grains of power pistol, and 230 grain lasercut lead round nose bullets. I fired 2 with apparently no difficulty, then the slide completely jammed. I was finally able to get it to move, and found that the casing that was in the gun was in fact loaded. When I fired this round, the slide locked open, as I'd removed the mag. I didn't fire any more of those, but did fire some 200 grain copper plated rounds with the same powder and amount again without issues. The gun is a Para Ordinance P14 and has only had about 500 rounds put through it. Anyone have any ideas as to what would cause the slide to jam given the above info. Thanks!