I have shot several Moose with the 7x57 and 140 grain Partitions. Never had to shoot one twice. Usually the MV was around 2850-2900, so not quite as much thump as your Short Mag, but got the job done fine. Farthest shot was on the order of 325 yards. The Accubond is a bit better on the BC, and should penetrate fine as long as you don't try shooting through big bone. Regards, Eagleye