That is just plum nasty, but in an awesome way.
And I thought that I had a handgun in my XP-100 in 7mm BR (which is ballistically equal to a .44 Mag---at the muzzle---at 200 yards) . Now you have me wanting something "hotter", LOL!!! Perhaps a 300 WSM
?!? :^) I just don't particularly care for my lovely brown laminated Fajen thumbhole stock, I'd rather have a rear grip like your dad's!