Winchester pre-64 Model 70 in 30-06, steel tube Weaver K-4 scope and and an assortment of handloads from 1,100 fps to 3,000 fps.
Four guns? How come?
....
.....Partly;
because a hundred grain bullet @ 11 hundred f/sec requires goofy powders or wild velocity variations, or both, and is an inefficient way to hunt squirrels... and .....
because hunting Bambi at BP distances in heavy cover and rough country with a 10 pound loaded weight rifle with a 24" barrel and a tiny FOV is not only un-necessary, but a handicap..... AND.....
because speedgoats( and other game) live in open country often requiring long shots in windy conditions, yet at the same time are fragile creatures that a make the extra thousands of foot pounds of energy merely wasted beating the shooter's shoulder, while giving not any advantage bucking the wind or figuring holdover .......and.....
One? One rifle? At the very least, "Murphey sez Two is One and One is None."......
Because really big grizzlies might not be really impressed with the math of energy calculations nor with ballistics gel studies......
.....not to even mention .....
.... that this is the internet, and the OP asked which four rifles......
..... which brings us to the MOST important point:
Dunno where you are , but I live in 'Merica! The thought of having just one rifle is repulsive to me ...... the thought of someone telling me I should need only only one ..... them's fightin' words!