i asked this on the S&W Forum and got an answer but want to verify this with any of you S&W owners. i just purchased a used 908S (economy version of the 3913). the magazine won't lock if you insert it with the slide closed/forward without having to jam it pretty hard (only did this w/o ammo). but when the slide is locked back, the mag goes in and locks fine. i can actually feel the difference the last quarter inch of the magazine being inserted. is this normal? i carry with one in the chamber so it really doesn't cause a problem. but i find it odd you can't insert a magazine without having to chamber a round.