I'm pretty sure I've heard or read the answer to this question, but I keep on forgetting how many feet per second 10 degrees (or whatever amount) temperature will affect velocity and pressure? The exact cartridge and firearm I'm curious about is 44 mag out of a 6.5" barrel. At 80 degrees I got 1306 avg fps with a 300 grain cast lead bullet. I was using 21 grains H110 and winchester primer.
