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My point being I use one of these calipers when I make ammunition.

I get the point of that 😜 but it's interesting. I guess that how you get the caliber of the ammunition right, isn't it?

Hmm, kind of. I use it to measure things...Overall length of produced ammunition as I a seek a consistency and to ensure the jump to the lands of the barrel is the same each time...This is one element from which true accuracy comes.

I see. There's a whole lot more to it.