Suggest you try some of these loads with the WSM. http://www.realguns.com/loads/270wsm.htm
Case capacity is different. I would move up to a 140 grain with the wsm and a mag primer for the larger case capacity and the use of a slower burn rate powder such as AA3100. I've never loaded AA 3100 but it has a similar burn rate to IMR 4831. If you really are going to get the potential out of WSM and want to stay with the 130 bullet you should consider a premium grade bullet that can perform better at higher velocity. I'm suspecting you have an inventory of the 130 sierra gamekings. I've used gamekings in a 25-06 at max velocity and found them to be great bullets for the price. Even used the 117 on elk on 3 or 4 occasions out of the 25 with good results. But for a few $ more you really have some better alternatives for the wsm velocity.