Sorry if what I say here is wrong, I may have misunderstood but here goes. I want to put together a simple project for paper punching, something a little nicer then off the shelf, but i would like to do as much as possible myself. I like the 30BR chambering I have read about, and I see some quality barrels pre-fitted for the Savage action. I do not see a Go No-Go gauge listed anywhere for a 30BR. Is it the same as 6MMBR? If not is there some place to get a set for 30BR? If i can't get gauges I would probably look at a .220 swift or .22-250 AI.