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Old December 15, 2011, 10:19 PM   #7
PawPaw
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Join Date: December 24, 2010
Location: Central Louisiana
Posts: 3,137
Slugging the bore is important, but what is also important is slugging your cylinder mouths. What you want to happen is for the bullet to go through the cylinder mouth, then be sized in the forcing cone, so the cylinder mouth has to be a thousandth or so larger than the forcing cone.

If the cylinder mouth is smaller than the forcing cone, the bullet is being sized at the cylinder mouth then going into the forcing cone too small to be properly sized to fit the bore.

Or, you can do what some folks do, just load 'em and shoot 'em. If they're a little oversize, they'll swage down when they hit the forcing cone. If your accuracy is acceptable, don't fix whut ain't broke.
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