I bought my wife a S&W 642 .38 sp revolver for our anniversary, yesterday she shot it for the first time. I bought 200 rounds of winchester ammo and have a concern over a few of the rounds. There were several that I put to the side and would not let her shoot due to the bullet being seated much deeper into the case than the rest. My question is to the reloaders, is there a measurement for seating the bullet that will make it unsafe to fire? I do not plan on letting her shoot them, just trying to learn something about ammunition from you guys/gals in the know. Thanks in advance.