Headspace gauges are not needed until you are sure of the gauge, they are quite expensive. I have quite a few and could lend you some if I have the caliber you need.

Firing form a 6.5x55 case sounds like a very safe option that should give you some valuable information. You will want to use a fast burning powder when you fire form.

Last edited by SKB; 12/30/19 06:51 PM.
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