win 760

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r106

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I've been playing with different powders for my 325wsm and it seems to have the best consistency with Win 760 and 200gr TSX's. @ 64gr it's grouping .843" @ 65gr .680" and @ 66gr .770" then opens up @ 67gr to 1.13" . The point of impact seems to be off between the different charges by only 2" from 64gr-67gr vertically. No point of impact change horizontally. Seems to be very stable across a wide pressure range with this powder.

#So hear comes the question - I have heard that win 760 is a bit temp sensitive? With consistent grouping accross different charges is it less likely to have point of impact changes in colder temps?
 
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Not sure of the temperature that you were shooting in, but it is the middle of July the hottest part of the year. I don't think you will get large pressure peaks closer to the winter months. Maybe if you did your load development in January and then went to shoot in July you should be concerned
 
nevanevan said:
Not sure of the temperature that you were shooting in, but it is the middle of July the hottest part of the year. I don't think you will get large pressure peaks closer to the winter months. Maybe if you did your load development in January and then went to shoot in July you should be concerned
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Ya I usually try to do it the winter months for hunting loads but work was busy so no time. It was about 25 degrees c when I tested them and usually -12 to +5 when hunting. Just wasn't sure how much point of impact would change with this powder
 
I have burned about 40 lbs of W760 over the years since it replaced W760BR.
While it does display some velocity loss in very cold temps, the losses are not
unusually bad.
I always take a shot in the lower temps at 200 meters, just to see if the difference is significant enough to
cause concern.
Unless you are hunting at -30ºC, I would surprised to see a 1" difference in impact.
Regards, Eagleye.
 
I like 760, has been a good powder for many different rifles for me. Temp sensitivity, if it is sensitive, has never been an issue for me hunting at ranges under 500 yards.
 
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