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Originally Posted by Swampman1
Wondering why some show as .429 and some at .430? Brand names? Shouldn't it be a standard size?
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If you look at SAAMI specs, you'll see the bullet standard is 430" -0.003", so 0.427" to 0.430". In practice, bullet makers can control things more tightly than that. The default industry practice has come to be to make jacketed bullets at barrel groove diameter, 0.429", and lead bullets at 0.430" to get a better seal to help limit lead fouling. There are a few exceptions to that general default sizing, though.