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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Crowning Options?
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<blockquote data-quote="Bart B" data-source="post: 505696" data-attributes="member: 5302"><p>From Elmer Shook, premier riflesmith who fit so many barrels for National Champions years ago:</p><p></p><p>Crown: the finish and shape of the muzzle from the groove diameter (or a bit more out) across the lands inward to the bore diameter.</p><p></p><p>Face: the angle of the muzzle from the edge of the crown to the muzzle diameter.</p><p></p><p>Years ago, a top shooter put diffferent face angles on a match barrel. The crown was the same for each; a 1/2" diameter brass ball with lapping compound on it that was pushed in to crown the muzzle until the edge just past the groove diameter was smooth. He started with a zero degree face; right angle to the bore. Then faced the muzzle one degree at a time to 15 degrees.</p><p></p><p>Clamping the rifle in a machine rest and shooting 20-shot strings with each face angle, the test groups started so so, then went down to wonderful, then back up to about average. At 11 degrees, best accuracy was attained.</p><p></p><p>'Nuff said about the muzzle face (or crown, if you prefer).</p></blockquote><p></p>
[QUOTE="Bart B, post: 505696, member: 5302"] From Elmer Shook, premier riflesmith who fit so many barrels for National Champions years ago: Crown: the finish and shape of the muzzle from the groove diameter (or a bit more out) across the lands inward to the bore diameter. Face: the angle of the muzzle from the edge of the crown to the muzzle diameter. Years ago, a top shooter put diffferent face angles on a match barrel. The crown was the same for each; a 1/2" diameter brass ball with lapping compound on it that was pushed in to crown the muzzle until the edge just past the groove diameter was smooth. He started with a zero degree face; right angle to the bore. Then faced the muzzle one degree at a time to 15 degrees. Clamping the rifle in a machine rest and shooting 20-shot strings with each face angle, the test groups started so so, then went down to wonderful, then back up to about average. At 11 degrees, best accuracy was attained. 'Nuff said about the muzzle face (or crown, if you prefer). [/QUOTE]
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Crowning Options?
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