My Marlin 917v is my go-to varmint gun, if I do my part I put all 4 rounds into about 1/4" from 75 yards. Its as it was out of the box except for a little bit of work I did to the trigger replacing the trigger return spring to lighten it. There have not been many squirrels that have managed to get away once in its cross-hairs.
Other than that, the old Marlin 336 in .35 Remington has been killing deer here for generations. If I was ever taken on a bear hunt, it would probably be my choice.
At some point I want to put together a left handed bolt action .308 that I will keep for the rest of my life. Want to go all out and make myself a precision instrument. I just can't find a left handed bolt action .308 that I am happy with.