I ended up usuing Ramshot hunter in my 1000 yard light rifle.
My best load gave up 7 mil clicks from 850 to 1000 yards when the temp went from 80 to 35 degrees.
The Berger program told me I'd only loose 3 clicks on a 80 to 35 degree temp change.
My velocity at 80 degrees was measured at 2806.
I had to back it down to 2730 to get it worked out right.
dave

[Linked Image]

Only accurate rifles are interesting.