Thread: Brass Bastards I know - 260 Nosler

Buying second hand brass from an unknown source is a raffle ticket.Giving benifit of the doubt the seller may not have any idea what a donnut is, many don't and when it throws accuracy out the window the rifle /barrel gets the blame. Youve picked it up and so saved yourself some frustration and extra cost.
You have some options, my first pick would be bin it and start with some new brass, along with the donut issue you have no idea how the annealing job was done so that could have negative effects and even if it doesn't you are always going to have it in your head when things dont go right.
If you want to salvage it you could choose a bullet that seats with the bearing surface/boat tail junction short of donut. You can inside ream but thats my least favoured option, its not easy to get right and theres no way of stopping the donut growing again, or you can use an over sized expander mandrel and then neck turn making sure you cut into the shoulder enough to prevent the brass flow.Its better done when the brass is new though can be ok with fired cases if the right sizing die is used, some, like bushing dies ,wont size the neck all the way to the neck shoulder junction and you can end up with differences in the wall thickness. If you are desperate to use it then you can send them and Ill turn them for you.
This is a new 6.5x284 case Iv turned because of donut issues, I use a 40 deg cutter