I have about 40 or so .45 ACP magazines, with the majority being Chip McCormick Shooting Stars and Power Mags, with a few Wilsons mixed in. I number my mags. so I can identify any that are giving me trouble. I found five mags that would not drop fee when they were empty.
They would when they were partially filled, but what good is that!? I carefully examined all five and couldn't see any signs of a problem. Since these mags were about to go into the garbage, I decided to give something a try. After all, I had nothing to lose.
I used Sears/Craftsman RoboGrips (the smallest size) to gently squeeze the forward lips of the magazines. I do mean "gently!" It didn't appear to be doing any good, as the lips appeared to spring back into their original position. I tried the first mag. in the gun and it dropped free without any drag or delay. I loaded the mag and made sure it would properly feed loaded rounds. I did the same thing to the remaining four magazines. It appeared they were fixed, but I wouldn't know for sure until I had a chance to use them at the range. Range testing proved all five magazines functioned flawlessly. So, mags. destined for the garbage can are now back in the shooting bag. I'll use them in practice and in matches, but they will never see duty in a self-defense role.mags
So, if you have a misbehaving magazine, try this before throwing it in the trash.