M-M-M-M Donuts

[deadidarren]

I noticed some members suggested doing a light skim and removing the doughnut. Would that weaken the neck where the doughnut is removed? I don't know so gotta ask as it appears I recently got some doughnuts. Also, is it possible to get a small doughnut and not have any issues with seating a bullet?

Only if you remove too much at that Junction you remove roughly the same amount as the internal doughnut so when you fire form you don't lose anything you just move it.
Well that's the way I do it sometimes it takes a couple of goes if you go way overboard you can use a piece of bent wire after the fireform process you will feel a little bit of a notch internally but you have to go and take way too much out

 

[boltfluter]

In my opinion, either bore or ream the donut out. Assuming it is not to big to be reamed. You cannot push the donut to the outside and remove it. Metal simply does not work like that. Again, this is based on my opinion and experience over the years. Try making a .22 Waldog case if you really like having fun with donuts! Boring and outside turning was the solution for me. To the tune of many groups in the 1's.
Paul