Ha. Late 70s - mid-80s Ruger tang safety take your pick .270 Win & Partitions (used to), 7 mm Rem Mag & Partitions (favorite), .338 Win Mag & A-Frames (among grizzlies). All have killed elk just fine. Once used only 4X, now they wear Leupold small variables with same size profiles as old 4X. (Yes abbreviated data.)

Lots of calibers kill elk.