coldboreshot
Silver $$ Contributor
Most or all of it blows to the outside under pressure. Then just use the bushing to size say the top 2/3rds of the neck rather than all the way down, which would push it back in. That said, as long as your bullet doesn't seat that far into the neck...forget about this donut stuff. Just shoot it.if the donut is inside the case neck, how do you move it to the outside of the neck ?
I have Lapua cases where when inserting a bullet in to a fired case with my fingers I can feel the donut like it didn't get blown to the outside. The bullet stops at the donut and doesn't drop in to the case.Most or all of it blows to the outside under pressure. Then just use the bushing to size say the top 2/3rds of the neck rather than all the way down, which would push it back in. That said, as long as your bullet doesn't seat that far into the neck...forget about this donut stuff. Just shoot it.
From what I have heard firing and sizing causes the shoulder to flow forward causing the donut. Look at some of Erik Cortina's video's. Almost all of the guys that shoot long range at a National Championship level use bushing dies. Been using bushing dies since 2009. 6BR light bullets are seated about half way down the neck and don't come near the donut. I assume I have donuts in cases that have been fired many times. i don't care if there are donuts since the rifle shoots small groups for GH hunting.If I understand correctly the bushing die does not size the entire neck and causes a donut. If this is correct then why use a bushing die ?
Sorry that makes no sense to me. The OD of the neck will be the same diameter regardless. The ID will vary with the size of the donut. Expander ball or mandrel will only partially move the donut to the outside. The only sure way to get rid of it is use a reamer.Most or all of it blows to the outside under pressure.