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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Crowns?
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<blockquote data-quote="daveosok" data-source="post: 22147"><p>You could do a recessed crown. That is where it is really a double crown and the crown part that contacts the bore is recessed further than the outer one. Both are at 11 degrees. You should cut a 45-degree angle leading from the recessed crown to the bore about .02 to .03 thou. When your bullet leaves the muzzle it actually will move the metal forward ever so slightly over a period of time and adding this 45 degree chamfer will lessen the build up at the intersection of the crown and bore over time. Make sure to lap the chamfer from the crown to the bore and make sure that it is an even 360 degrees this is the most important part of the crown.</p></blockquote><p></p>
[QUOTE="daveosok, post: 22147"] You could do a recessed crown. That is where it is really a double crown and the crown part that contacts the bore is recessed further than the outer one. Both are at 11 degrees. You should cut a 45-degree angle leading from the recessed crown to the bore about .02 to .03 thou. When your bullet leaves the muzzle it actually will move the metal forward ever so slightly over a period of time and adding this 45 degree chamfer will lessen the build up at the intersection of the crown and bore over time. Make sure to lap the chamfer from the crown to the bore and make sure that it is an even 360 degrees this is the most important part of the crown. [/QUOTE]
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Crowns?
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