Jeff, that's what I shot out of it yesterday. The Hornaday 350s. What are the new Hornadays that you are referring to and what is the maximum grain that you can find for the 450? As far as not kicking too bad I guess it's because I was really expecting to be rocked by it but wasn't. I was thinking of having it magnaported but I think I like my eardrums too much to have that done. Either way I'm very glad with the purchase and look forward to trying some different rounds through it.