Hah!
It is off the rump "haunch" of an elk. BTW my wife shot this last one at 520 yards! Did I mention I teach long range shooting on the side? Elk meat is yummy.
Before he passed, a guy (Klause) here from State Arms in WI built a 50BMG necked down to .375. Got 5300fps. Shot an elk at 1400yds. 3" inlet hole and 14" exit hole. It destroyed the rifling so it had to be tamed down.
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