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I ..... load with ADI powders, and never give temperature effects a second thought. Ever!
I agree 100%. I use ADI - equivalent of H4198, H4895, Varget, H4350 & H4831 SC & they shoot consistently in winter at 10 degrees centigrade & summer at a very high UV rated 35 degrees centigrade (radiation effect is more like 50 degrees centigrade). VV N160 & the Alliant Reloader powders are also very stable. I will never use Winchester ball powders as my friend Barry gets 200 fps to 300 fps variance in velocity between a cold winter day & a hot summer day.
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