I was paging through the model 70's on guns america a couple weeks ago, and lotta wssm's on there. I never understood the need for all these new cartriges. Plenty of normal cartriges to choose from. I could never see buying a gun in some whacky caliber either. I'm really surprised how these .17 rimfires have taken off. I don't quite see the point, why wouldn't you just have a .223? I guess some guys just like to have lotta guns.....