Today I happen to catch a mistake I made reloading .45 caliber. I have wooden blocks that house 50 rounds each and I had reloaded 250(5 blocks) and had not gauged them yet. Well normally I gauge all my rounds with my Dillon case gauge. Some of the rounds are tight in the gauge however I have an idea of what I can get away with since the gauge is really precise. Today I decided for S***S and giggles to "plunk test" my rounds. I used the barrel out of my Commander for my gauge and guess what-I had a round that by no means would fit halfway down the barrel. It would stick hard and I mean hard!!! I use an old Herter's single stage loader for all my .45's which means I have to resize, deprime and bell the rounds, and then install my projectiles which are Berry 230 grn. round nose. The ONLY thing I can think of is I DID NOT resize that round or did it improper which is almost impossible to do. I must have failed to resize that round. Somehow I got out of my standard way of following my procedure and failed to resize the casing. I emphasize to all who reload: Stick to your procedures and do not get distracted!! I am so glad I found that round before going to the range and having an AD or even worse. Make sure you gauge each and every round before using. I am not proud (actually ashammed) telling of my screw up but I don't want anyone to ever get hurt by not following your set procedure.