Chamfering

[Tulsa Reiner]

I've heard about the flash holes lol, and figured out that was why a few of my primers didn't seat correctly so I tossed the cases to the side. I do like doing all that technical work, time consuming but seems to really produce the best ammunition. There's so many different variables in how something performs it really shocked me as I got more into it.

It's called a Flash Hole Reamer, and the good news is you only have to do it once in the life of each piece of brass, when you first put it into service. It corrects a potential burr left behind in the manufacturing process.