Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Jerry, I've been using 18gr of HP3 to fire form my 22-250 Lapua cases....it leaves a nicely formed shoulder but I end up with an interior bump or donut on the inside bottom of the neck. I can load 140 VLD's long enough to just miss seating onto the bump.
I've ordered a 6.5 pilot reamer to remove this inside bump so hoping that will work....any Ideas? Thanks
Anytime you expand a case where the shoulder of the parent case ends up in the neck of the new one, there will be extra brass in the form of a donut.
I use a Lee collet neck die which pushes the excess brass to the outside and then outside neck turn... problem all gone.
you can preempt this problem by outside neck turning the parent case well into the shoulder where the donut brass would originate.
Far easier then the bushing neck die, expander, inside reamer routine most use.
YMMV
Jerry