The gun that's at the front when I open my gun safe!
Of all the rifles I own, I usually grab one of two my old faithfull guns.
My WW Featherweight M70 in 7x57, or my Rem. Classic in .264 Win Mag.
And of course, there's always at least one AR-15 in .556 that lives in the truck for Coyotes and Hogs when I'm driving around the Ranch checking feeders or fences.