Thread: slugging a bore

Originally Posted by Bill999

I had a bullet stick in my barrel of my rifle, it was copper jacketed and was just due to insufficient powder charge (sub loads with trailboss)

now that Iv gently removed it is it suitable to measure for selecting the correct sized lead projectiles for my rifle?

do i measure the rifling grooves or the area between rifling marks?

I've never heard of it done with a copper projectile. It's simple do with a lead projectile, I'd be inclined to re-do it with an oversized lead projectile. You want to measure the groove diameter of the barrel, which is the wider part of the slug.