Winchester’s new .17 Winchester Super Magnum may not be the most hotly anticipated ammo development of our time—I’m thinking actually having some for sale sets that bar—but it certainly can claim one of the most interesting provenance stories. “We have a power fastener division of the company,” Winchester Ammunition’s Rimfire Senior Product Manager told petersenshunting.com. “They make cartridges for power nail guns and such. Well, we based this case off of the .27-caliber power fastener case. It gives us more case capacity, can handle higher pressures and ultimately more velocity. Lots more velocity.” Mike Schoby reports that “The new load from Winchester spits out the 20-grainer at 3,000 fps and a 25-grain load at 2,600 fps with energy levels right at 400 ft. lbs. and 375 ft. lbs. respectively—150 pounds more than the 17 HMR and solid 60 foot pounds more than the hottest .22 Winchester Magnum loading!” Exclamation mark indeed.
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