Yep 10 twist with 185s in a 308 Win plain works on Big critters. Like the old saying goes, beware of the man with just one rifle. It applies in this scenario.
My M1A can kill 18x24 steel at 1000 yards with irons. Inside 600 with maxed out load 185 VLDH (brass one and done) and a scope, I'll take the shot. The receiver has been through 3 barrels and each lasted 32 pounds of powder in competition