Quote Originally Posted by bsekf View Post
OK, so you use a brass carriage bolt chucked in a drill press with the barrel held perpendicular. Liberal application of valve grinding compound. Seems like the brass bolt head would form to the muzzle/bore rather than the muzzle/bore forming to the bolt head? Why not use a carbide deburring tool rather than a brass carriage bolt? I agree the angle of the muzzle is not as important as being square and sure wouldn't want anything turning in the bore to screw up the last few inches of the rifling.

We agree that it is impossible to bore and rifle a barrel perfectly straight (tools drift), so I figure by cutting it, removes some of the drift. Virgil King (Houston warehouse) said 21.75 is optimum barrel length.

Bill
IN CONTEXT for a purpose built BENCHREST RIFLE...noting to do with a field or hunting rifle.

the 11 DEGREES MENTIONED comes from the exit nozzle of an rocket engine