Originally Posted by
9.3X62AL
WC-860 has been a strangely useful propellant for me. 100%-density loads in commercial 6.5 x 55 brass (55.0 grains) gives 1896-level ballistics in my Ruger 77R of that caliber with 140 grain jacketed bullets--2450 FPS and SUPERB accuracy. I have "duplexed" the slow-burner with IMR 4198 in 45/70 and gotten 1873-level ballistics with 400-425 grain cast bullets, 1300 FPS or so and again stellar accuracy. The "boomy" report seems to be a trait of these slow-for-application powders--and a fun one it surely is.