A LH Browning A-Bolt in .300 Win Mag. Hornady 190 gr. factory ammo. Got an elk, too (a nice 6x6, no less).

I later replaced that rifle with a Remington 700 KS in .300 Win, which I still have. The .300 Win. is about the only caliber I've ever used on elk. I do have a .340 Wby Fibermark that I'm going to try out this year, though.