Cabela's and Winchester just released 7X57
and 257 Roberts, and 264 Win Mag in Win Mod 70 Lightweight Supreme, available in Cabela's stores, only. (No internet sales).
My 7X57 is a custom DuBeil with laminated stock and LH action. It carries a Leupold VX 3, 2.5-8x36 scope in Conetrol rings and bases. I handload it to 2,950 fps MV (chronographed) with 1 MOA results, and no signs of high pressure, 139/140 grain bullets. Factory loads usually chronograph @ 2,660 fps in my rifle.
It makes me HAPPY, HAPPY, HAPPY!
Even so, if the new Cabela's/Winchester model was available in LH action, I would be tempted to get one.