I have a set of pacific tool an gauge chambering reamers. 338-408 cheytac improved. 1- Chambering finish reamer. Reamer has a .365 neck dia. and 35 degree shoulder. Has Floating pilots also. 338-big baer brass fits chamber perfect after turning necks. 1- Full length die reamer to match chamber finish reamer. floating pilot 1-head space gauge to match chambering finish reamer $225.00 shipped Brass is already sold.