I dont think you will see the .270wsm fail from what I have seen.Around here it is doing very well.Now even remington is making ammo for it and the .300wsm.I think the wssm line is doomed you never here of those mentioned.I think the .223wssm is a great round just no one wants to try it. the rest (.243wssm,.25wssm) just havent got enough change in them for people looking for the hype of winchester SSM craze.I think that my .220 swift is having a hard time staying as a standard cartidge in most factory rifles.I dont understand it either,it is a great round and is as good as it gets in a .22 calibur.