My .22-250AI and 6mm-REM-AI have enough accuracy to go after groundhogs out to around 200 yards while fire forming.
Kelbly built the gun using a PANDA ACTION and made the barrels.
The only thing I did was mount a scope (8-20 with a doubler (around 18x to 40x) back when Premier Reticles
(Winchester, VA IIRC) was factory authorized to modify scopes, and change to a Jewel BR trigger.
It is death on ground hogs.
Longest so far was around 440 yards.
One shot, groundhog parts.
It makes for rather relaxed shooting from a portable bench-rest stand.
Set up everything, start glassing for groundhogs with Pentax 10x40 binoculars.
Switch to Kowa 85 mm spotting scope (goes up to 60x).
Use IR range finder on some objects (like trees) around the groundhog.
If there is not anything large enough to capture with the IR rangefinder,
I have a 1 meter 'coincidence' optical range finder.
Look up drop on index card, set scope, dead groundhog.