It will peen the ends of the necks requiring chamfering every time you tumble in the pins.does it hurt the brass
Yeah, K9TXS is right on target about pins. I've been using them for a while now and the results are great, cases come out looking newly manufactured. However, the pins will become stuck in flash holes and inside some cases, .38/.357 and 5.56 seem to be the worst. I'll be switching to steel chips soon, after I get a few more miles on the pins.I prefer the chips over the pins. The pins have a tendency to get stuck in flash holes or the case. Chips will not get stuck.
I don't remember which chips I have used but they were very flat. Might have been from Ammo Brass.