V-man, If some of those 405 are keyholing on paper they definately will on a hog. When they do, penetration won't be great. I imagine your 300 xtp mags will out penetrate them with no trouble. Set up about 6 or 7 phone books, water jugs or whatever, and do a little testing. They may not do as well as you think. I'm sure they will kill but not as well as a good stout stabilized bullet. Dave