Originally Posted by KShack
Like I said, I am new to reloading and am wondering how I can tell that I have the proper crimp on my rounds. I'm using a Dillon Precision 650
First off, you probably don't need to crimp especially if you're loading light loads. Crimping protect the round from having the bullet seat deeper during heavy recoil. And, deeper means more pressure and more danger. But moreover, the 40 S&W head spaces off the mouth of the case. If you don't know what that means then go back and buy a couple of loading manuals and read them.
Anyways, since the 40 head spaces off the mouth, you can only crip using a tapper crimping die and not the roll crimping portion of most seating dies if that's what you have.