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Old November 9, 2018, 09:34 AM   #4
Join Date: March 4, 2005
Location: Ohio
Posts: 16,742
An ounce is 437.5 grains, so you are right that this is close to ½ ounce rather than ¼ ounce, just to be sure we're all on the same page.

Bore vs. bullet diameter is a topic on another thread. A lot of Sierra MatchKings seem to run about half a thousandth over nominal groove diameter. Palma barrels for long range shooting are often a thousandth and a half under standard groove diameter, making them very snug for the bullet. But that's sort of the range I see.

A question important to velocity is, what barrel length are you planning on?
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