I took my Remington Rand 1911 that had been turned ito an SA built NM to the range today this was the first time I have fired it. It is very accurate but there was one glitch I can't figure out. I put a seven round loaded mag in it closed the slide took aim and bang, I tried to fire another round and the trigger would not move. It felt like the slide was out of battery, but when I looked at the gun the slide seemed to be fully forward. I ejected the live round an tried again, same result. After awhile I thought I would try a different magazine, it ran like a champ. I put the mag I was having trouble with into an Argentine 1927 1911, Bang, Bang. All seven rounds, no problem. It seems like that one mag was interfering with something in that one pistol. I sure don't know what caused it. I figured if anyone knew they would be on this forum.