Been reloading for only two years and looking for comments from others with more experience. This summer I dialed in two rifles, FN SPR in 308 and Blaser R93 in 6.5 x 284. I keep reloaded ammo in an insulated cooler so the ammo doesn't get too hot sitting in car, but I am sure it still gets hot. This winter in Michigan the temps were quite cold. I shoot a lot at an indoor 200 yd range with no wind to deal with. The 308 used IMR 4064 and the 6.5 used H4831sc. Primers are CCI 200, flash holes deburred, full length resizing, accurate COAL, same powder weighed accurately. Both guns when zeroed at 200 yds at 70-90 degrees shot 2-3" low at 200 yds at 20 degrees. Never checked speeds with crono but both guns are sub .5 MOA. I guess the guns also have those temperature swings too now that I think of it. Has anyone else seen that much shot placement variation due to temperature of ammo? I had dope worked out to 700 yards for both guns in warm weather and had to redo it for cold, is that normal? Thanks for the help!