Seems to me like Ruger wanting to stay on the Short Mags bandwagon with a version of their own, but don't want to pay Rick Jamieson's royalties! (especially since they dropped the WSM's like a hot spud after Winchester settled with him).

Maybe I'm a just a bit cynical, but I'm not impressed with Jamieson's shenannigans after this happened just after I'd bought my Kimber 300WSM! By trying to make a buck out of it, I think he's done his best to stifle the WSM's, but I hope they last long term.