The right way to do it is to set headspace off of a gauge, no I dont know where to rent one. In theory, your factory loaded brass should be usable to set headspace, but If I did that it would be checked with a no go and a go before I fired it. The problem that comes in to play using brass is that it can be sized slightly smaller than saami minimum specs (so it can fit in very tight but saami compliant chambers) and you could run into chambering issues with other manufacturers. I would feel comfortable setting it off a once fired and sized piece of brass, but I reload and can guarantee the uniformity of the brass I'm feeding the rifle... I still used a go/no go gauge on my rifle.
Yes, that belt has a very specific measurement.
Bookmarks