OK after reading several post about temp instability of RL25 I decided to do an experiment because thats what is my loads. I'm not worried about BR accuracy but sure dont want to miss a big bull while hunting in cold weather. I get 1/2 moa at normal temps. I chilled 6 rounds for 5 days @ 12F to compare MV to room temp loads. I set up my chrony so that I could fire within 60 seconds after taking the chilled load out of the refrigerator/freezer. I tested these in 3 groups of cold-warm-cold in each group. The ambient air and my rifle were 70F. These were my results: cold-3186, warm-3164, cold-3078 then wait 45 minutes cold-3167, warm-3183, cold-3128 then wait 45 minutes cold-3171, warm-3181, cold-3116 I was happy with the 1st 2 shots of each round, what happened on the last shot each time? I noticed that in the few seconds it took to take the round out of the freezer and put it in my gun that frosty condensate would form on the brass. Do you think that on the 3rd shot of each round putting the cold load in the hot chamber condensation was forming resulting in the lower velocity? What do the experts think?