Well... I generally top off any auto for SD, so, yeah, I know I seated the mag and there's a round in the chamber for that.
I, personally, wouldn't be banking on being able to do a press check under a critical situation, so I think I'd rather spend a little extra time ensuring that I can seat a mag under pressure.
Sorry, but I just don't see the merits of press checks.
Mal: "If anyone gets nosy, just...you know... shoot 'em. "
Zoe: "Shoot 'em?"