Donut formation question

[KiloTango]

Hello,
I have some brass that I neck turned that has been fired 4x. If there is no donut formation at this point, would you expect to see it in the future?
Thanks,
Ken

 

[Deleted member 46119]

Mix some flour, yeast and water.

or

If you did it right ..... You will have to go to the donut store.

I don't think there is a hard rule here.

I have a lot of Lapua that has some cases with donut. TBH I think I got the turning a little short.

So far, I've not seen a donut develop on those cases I 'got right' so I can't say.

I don't shoot hot but as I understand it, hot loads will 'flow' brass back up into the neck. Then you ream. I got the reamer for the Lapua brass but have not processed that lot since it arrived.

 

[Mikecr]

Donuts form with sizing. When you roll brass up the body into necks, you form donuts.

 

[Deleted member 46119]

Donuts form with sizing. When you roll brass up the body into necks, you form donuts.

Harumph

 

[Mikecr]

I should have mentioned, if you don't have to do a lot of body sizing, and you're mindful not to cause donuts, you will never re-form them.
You removed any with neck turning, and they just don't happen again on their own.