Just read an article on the Winny .25WSSM in the Shooting Times that arrived today. After reading about this new whiz-bang cartridge I was feeling pretty good about the Ruger .257 Roberts I picked up a couple weeks ago for a shot-out Savage 110E in .22-250 and $150 out of pocket. The Ruger even came with a Leupold to sweeten the deal!
After working up handloads to Barnes published .257 Roberts +P data, the .25WSSM has a whopping 11fps advantage with 115g bullets, the weight I have selected for hunting purposes. The Winny runs 2994fps with a Win 115g Ballistic Silvertip, my Ruger runs 2983fps with a 115g Barnes TSX (Triple Shock).
I get 4 rounds in the mag, the Winchester gets "only" 3.
Guess I'm not sold on the whole ultra-short cartridge concept, but to each their own - if I was looking for a new rifle and didn't already have a .25, the .25 WSSM would certainly be one I would consider.