my ultra varmint is very accurate with the 45 gr jhp winchester white box, and it cost me about $280 if i remember correctly.
i bought my rifle with the intent to use it as a coyote and groundhog getter, but i've heard that some guys have had less than humane kills with the 45 gr hollow points since they're designed for very shallow, explosive penetration (i.e. great for groundhogs, not so great for bigger, tougher varmints).
i haven't crossed paths with a coyote yet, but i can vouch for the cartridge's effectiveness for g-hogs. since my handi doesn't shoot the heavier 55 and 62 gr fmj bullets accurately, i'm a bit hesitant to try a coyote if i don't have a clear shot at the chest.