As some of you know, I'm am just getting started in reloading
. I bought 100 new cases for .223 for my first attempt (this makes things easier for me).
I measured a few of them, and they varied in length. So, I ask you guys, do I need to trim them before I seat the bullet? Do I also need to resize them? I will be crimping the brass, BTW. Thanks for any and all help.