Since there is no "right answer" this should be okay....

Not my first rifle (M700 in .270)
Not my so called "family heirlooms" (Dad's M94 30-30 or Grandpa's Model 12)
Not the shotguns nor the pistols (though that would hurt a bit)
I'd stick with my most adaptable mid-bore....

Its a M70 Super Grade in 375 H&H with a Leupy III - 4x12
(It shoots sweet and I feel can go a-n-y-w-h-e-r-e with that one and get it all done.)

One planet,
One rifle,
Holland's 375....
[It's not an original line, but I like the "line" as well as I like that rifle!]