Originally Posted by
Beerhunter
In my opinion, the real issue with the cut-off (which I only ever see raised by me) is that of the extractor and extractor spring damage that it causes. When the cut-off is used as a loading platform, instead of the rim of the cartridge sliding up into the extractor claw, as is does when fed from the magazine, the claw is forced to cam its way over the rim. Loading single rounds in this fashion cannot be good for the extractor and must put more strain on the extractor spring than if the round is fed from the magazine.
Even when firing single rounds, I make a point of always loading the round into the magazine first and then letting the bolt feed to round up from there.