Otis-Do both browning and winchester each have a new shorter action.I was looking at the browning data sheet and the wssm' s are only 3 ounces lighter than the 243 and that is with the shorter 21" barrel.The shorter barrel will account for most of if not all of that 3 ounces.Irreguardless if the 243 wssm does produce the extra 200fps, the recoil of the 243 wssm will be more than the 243 and with the shorter barrel and increased velocity the muzzle blast will be more than the 243 as well.Winchester and browning did a good job of misleading advertising(and some outright lying) with the first wsms and did fool some people into believing that the 7mmwsm and 300wsm would produce more velocity and less recoil than the 7mmremmag and 300 win mag but they could not fool the chronograph.Loaded to standard pressure the 7mm and 300 belted magnums still produce slightly more velocity than the 7mm and 300wsm' s.Due to the lighter weight of the wsm rifles they actually produce felt recoil comparable to the belted magnums.I have not used the new wssms yet myself but based on the original claims made by winchester and browning about the original wsm' s,I would not be suprised if the new wssm' s fail to live up to the claims being made as well.