Hornady 55gr FMJBT. Drill nice holes in whatever gets in the way. There will be no expansion, maybe a bit of cavitation. Any match or varmint bullet in this weight range will grenade the Jack. Not a big deal if going for max destruction but not so good for food.
the win 40gr Varmint factory ammo is another cheap option to try. Many have found this to shoot very accurately for the distances you are hunting. I expect large exit holes.
Another thought is to use reduced loads. You can download the 223 to mimic anything from the 22magnum, through the 22 hornet, etc. With a muzzle velocity under 2500fps, most 50/55gr sp's will not expand explosively but will expand enough for good kills.
Downloading some 60/62gr SP might get you a Barnes X type effect on the Jack. Think impact velocities around 2000 to 2300fps.
Hodgdon site has lots of such reduced loads. They can be very accurate too.
Jerry