As far as what you call "striker drag" take a look at the slide where the firing pin comes out to hit the primer. It's supposed to do that (exactly why I have no clue) as the firing pin hole is not perfectly round. There is a small "bevel", if you will, at the bottom of the hole. I've had no ill effect of this. As a matter of fact I kind of like it. As long as no-one else is shooting a 45 shield it's easy to know which brass is mine!