I've followed the snap-it-shut-firmly line, to avoid dynamic hammering from a partial lockup. Someone at the gun club told my son off for closing our Beretta too hard, though, and I listened to his point.

Later, however, I saw this guy waving my late father's SLE AyA back and forth with the fore end off, checking for wear. What a ... liberty, as Catherine Tate would say. Surely this borders on unnecessary abuse, too. The gun was not for sale and any wear was none of his business.