My 25-06 launching 75g V-Max's beyond 3600fps really tears a groundhog or chuck up.
The worst case of this though, was when I shot one through the mouth at about 30 yards. After the vital head explosion, fragments of the little pill continued through the neck, completely vaporizing it. Beyond this point, what was left of the hog flew through the air and all that was left was a few chunks of fur and blood.
BTW, did you post this at RimfireCentral also? The same exact topic is in the hunting forum...