am in need of above to use in drilling. case is a 9.3x72rmm TAPERED down to groove of 0.354. throat is same dia. this confirmed by chamber cast and slugging of barrel. case is 2.83in. +/- in length. col is 3.4 in. vel expected of 1800-2100 fps. quary is whitetail. in N.GA. my avg. shot is 35-80 yds. have handloaded various calibers for years with jacketed bullets. don't know beans about cast but figure vel is high enough to need checks. have new norma 9.3x72rmm cases and set of dies from huntington's rcbs obsolete die list marked exactly as "9x72mm(8.7x72)". arm is marked as 8.7 72. cases sized allow closure of action. plan on using imr 3031 with start in mid 20's and work up with chrony. can any one point me in direction of bullet supply? any thought on hardness? expect water capacity of brass in mid 60's. any one here have powder quantity thoughts to max around 20000 psi. arm is nitro proofed from suhl in period of 1912-1939--probably in 20-25000 psi range. barrel length is 26.5 in. consider all suggestions as this is new ground and full of roots!! drilling proofed for 13g B1.G.--a lead bullet of 200 grains.