How did you remove the tumble lube grooves?
I used a boring head on my mill, adjusted for a .359" hole. I bored each one in a single pass, since the tumble lube grooves aren't much to remove. With traditional lube grooves sometimes I make multiple passes.
I have done them with a reamer before too; it works but the finish isn't quite as good. If I didn't have a mill though, I'd still continue to do them with a reamer; it's worth the improvement on some bullets.
