Hi Joe,
Found this in a quick search:
http://en.wikipedia.org/wiki/.17_Win...r_Super_Magnum
Made for this rifle:
http://www.savagearms.com/bmag/bmag/
I'm sure there are other makes/models that will take that ammo now possibly...
Only pricing I could find was here, out of stock, and no backorder ( 154.99 for (10 Boxes of 50) ):
http://www.midwayusa.com/product/290...ubv12900461810
Hope that was the info you were looking for!
-S.c.o.t.t.