Thread: Donuts in my 7 saum brass

Yeah yeah how did the donut get in the brass I hear you laughing! Real question. 5 x fired Norma brass. Full length sized using redding dies. It's got fu$king donuts inside the neck. How do I stop that?

got a pic

check out @GWH's thread on here from ~ 6 mo back.

You can use a k&m carbide neck turner mandrel to cut out the donut from inside the neck and touch up the outside junction between base of neck and shoulder, and you will be back with brass even better than before

For what its worth donuts can be caused by dies. In my 6.5x47 with once fired brass I couldn't believe it, sized a few cases through a Redding die (luckily not the whole batch) and bugger me, several donuts . . . not supposed to happen according to the interweb but it did. I went to a Lee Collet die and no more problems since. The collect dies are not available in a wide range of cartridges but you can usually adapt them to another cartridge by machining the collet to adjust its length.

No not shitty Lee stuff

Lee Precision are the leaders in innovation .... Everyone else is merely a follower

Cheers
Pete

Ok thanks for advice. I'll go with friwis idea first as have a mate with a cutter.