lol sorry to disappoint old chap
there u go.......
Crowning a rifle barrel, in simplest terms, is shaping the muzzle so
the rifling's edge is protected from impact. Most factory barrels have
a round, convex-shaped crown from bore's edge to the barrel's outside
diameter. That's easy to make and finish, plus looking rather pleasing.
The accuracy part of the crown means the land and groove part of the
barrel must let the bullet's base exit evenly all the way around. When
this happens, gas escapes uniformly and evenly around the bullet's base.
If gas escapes unevenly (poor c