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Old May 21, 2012, 03:26 PM   #4
Jimro
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Join Date: October 18, 2006
Posts: 6,777
If I remember correctly (and that is a big if) Varget will gain about 15 fps from 0 F to 100 F. So going from 40 to 80 should give you a gain of about 6 fps.

Changing brass is likely the cause of your drop in velocity. The vertical stringing with a "new" load is likely your barrel settling into fouling. At this point I would say to do the test again with a fouled barrel to see how it performs for you.

Jimro
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