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Old November 8, 2012, 08:33 PM   #7
Senior Member
Join Date: October 9, 2004
Posts: 185
Well, I tested the factory Winchester Power Point 150 gr loads in my then new Winchester Super Shadow .270WSM back around 2004 or so, and if I recall, they tripped the skyscreens at just over 3100 fps. The accuracy wasn't great, around 2" 3 shot groups at 100 yards from the bench. Subsequent handloads with Vihtavuori N-165 and Nosler 140 gr Accubonds matched the velocity of the factory 150's and grouped well under an inch at 100 yards. I suspect if I chronographed those factory loads today (I still have most of a box at home, maybe I should try it) I would bet they won't break 2900 fps. A slight bit of throat erosion.... But I bet my brand new unfired .270 WSM Model 70 Ultimate Shadow will!
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