If any of them fail I think it will be the 7MM Short mags from both Win. and Rem. I think it will last but it has intense compitition. In reading the reloading manuals they almost all mention the fact that the 7mm Short mags suffer from lack of powder room for the heavier bullet. Of all the new short mags, the 7mm holds the least interest for me. They offer very little improvment over the 280 which I already have.