Mongoose, tough pest, too much for .177?

My friend uses a 25 caliber and told me they are very tough critters even with head shots and mentioned he would worry about humane kills anything less than a 25 caliber from what he shot. He uses a tuna can for bait to lure them in to shoot them at 20 yards. He said using less power they still run after being shot in the head. He even ran one over the head with his car and it appeared dead for 10 seconds then still shook it off and ran. It was on his grass lawn he put out a baited tuna can under his car in front of the tire. This was before he got into airguns.
 
Only good way to make them pause is good/bait. Under 20 yards even with .22 there shouldn’t be too much of trajectory problem. I say zero at 20 and hold slightly higher for 15 yards.


Yeah if anything a heaver pellet at any given power level will have a Point Blank Range (PBR) that is in closer.

I moved to a new house with very different pest shooting situations and from playing around with Chairgun it actually seems the heavier pellets are an advantage at close range.

Maybe with a super high scope position like on an Airforce gun there would be a problem but even then with only a 6 yard variance in the shooting distance that shouldn't be a problem.
 
sorry if this seems like a stupid question. but where are you all experiencing mongoose trouble? peep profile doesnt show where he is. i am assuming these critters have not stowawayed to the usa.

i am unexperienced in hunting, but i thought i heard jackrabbits have much tuffer skulls than bunnies. so, dont predators like mongoose also have tuffer skulls for fighting?

i appreciate your answers
 
Personally, first if legal / possible to get, as long as you don’t have to worry about the back stop, aka either if you miss or a pass through, I would go at least 50/100% more energy than “recommended” for a human kill. Meaning, if you need say 6 ft/lbs at point of target, I would make sure I have at a minimum 9 ft/lbs and ideally min 12 or more.