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#2
03-30-2005, 02:57 PM
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I couldn't answer why, except to observe that just possibly a barrel with fewer grooves or a rougher finish or a smaller diameter might perform better if the bullet has a shorter bearing surface. My reasoning is that there is less bullet to either engrave or force into the grooves.
As to measuring, the bearing surface is simply the length of the shank that is at full diameter. That's not too difficult to measure.
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