Originally Posted by Mule Deer
My comparator is the steel dial caliper kept on my loading bench. When I want to compare ogives on different bullets, I lock the caliper to halfway between bore and groove diameter for the caliber (as an example, .304 for .30 caliber) then use the caliper's jaws to scribe a line around a bullet at that diameter. This also makes finding a similar seating depth for different brands of bullets easy.


Good idea

Question, why not at .300" land diameter?

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