Originally Posted by MontanaMarine

Rule of thumb, about 1 fps per degree of temp change.


Did a ladder work up for shooting buddies 6.5x47L.
Back in April.Temps were 48 to 55F
140g Berger Hybrid was running just under 2950 FPS.
Good solid accuracy at 500 Yards.
At the first 1000 yard match temps went from say 50 to 70 during the course of the day.
All day long two thing happened.
We had to take off "up" clicks, as the day got warmer.
The warmer the day got.
The more targets we missed.
Higher temps took us out of the "node" and accuracy took a dump.

Reloader 17.
A good lawn fertilizer.

dave


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Only accurate rifles are interesting.