243 Win would be My choice of cartridge for a walk around/truck gun................Hb
BRAD are you ready for a shock ??
Instead of a 243 for the OP's purpose.....
I suggest a 308 W !!!!!
***In the same rifle a 308 will be 'lighter' than a 243--- the HOLE is larger in dia. from the case mouth ALLL the way thru the bore !!!
Larger hole = Less metal = Less weight.
This is one of a FEW times I'd suggest a 308.
Jerry