Hey guy's, I asked a question about primer difference and cold temp ignition, I placed a 7mm rm round in deep freeze for exactly 1 hour , when i removed it I had to wipe off the frost before chambering. It was loaded with 65 grains of H1000 and 210 match primer, and it fired just like it was 70 degrees I really thought there might be a slight delay, so now I guess it will be pretty cold outside to replicate this condition today. Hope this helps someone else besides me