Thread: Minimium amount the projectile should be seated inside the neck of the case

also recently have heard short seating CAN lead to a doughnut forming in neck area...took me awhile to work this out,believe the pressure of powder etc will push base of neck out more than the bit with projectile in it....dont know if it is issue or not.[/QUOTE]

Don't see how this could happen if the shoulder is headspaced properly the neck is fully in the chambers neck and can not expand more than the rest of the neck,
Doughnuts are usually formed in neck turned brass when fired the step in the brass from turning is reversed and is on the inside of the neck and is the beginning of a doughnut
the brass moves forward every time the case is fired and builds up at the base of the neck,
Chasing the rifling is a waste of time in a standard factory chambered barrel, just load the projectile to the manufacturers specs and do your load development, unless the rifle
is a pile of rubbish it will be more than addiquit for hunting at normal distances.