Re: 7mm Ultra freebore
Frank, Send the reamer back to Dave for a match regrind, and spec out your neck diameter .003"-.004" over loaded neck dia. with a lead dia. of .2845". Then give him a free-bore or lead length that will work with what your doing. If your measuring a dummie round, from case neck to end of bearing surface, minus about .040". 1-30 taper or less.