Many years ago my younger brother and I were duck hunting in an old rice field on Little St. Simons Island off the GA coast. I heard his 20ga 11-48 shoot a squib load. I hollered not to shoot again, but a big bunch of bluebills came in and he fired.

The barrel burst at the choke. I've had a number of squib loads myself but always stopped to clear the barrel ever since that time...Geo