JUST DONT SHOOT THAT 400 LB HOG WITH A 22 . I HAVE SHOT BOARS THAT WEIGHED IN AT A LOT LESS AND WITH LARGER GUNS AND HAD THEM CHASE ME. GENERALY IF YOU ARE CLOSE ENOUGH TO A 400 LB HOG TO HIT IT IN THE HEAD WITH A 22 YOU ARE TOO CLOSE. A HOG IS A MEAN AND NASTY ANIMAL AND THEY ONLY GET NASTIER WHEN WOUNDED. STICK TO THE SMALL ONES FOR NOW AND INVEST IN A GOOD 30/30 OR 12 GAUGE WITH SLUGS OR BUCKSHOTIN IT. FOR THE BIG BOYS.