Pay closer attention to the powder filled cases before dropping the bullets next time your reloading and if it happens again figure out where the process screwed up. Like others have said there are numerous options.

I've had Trail Boss and IMR Target get jammed inside the powder dispenser on my Hornady LNL. It starts dropping light loads, and then half loads, and then nothing.

Light handgun loads aren't going to blow the gun up unless you shoot another round into the stuck bulket and then it's probably only going to buldge the barrel