New to the site but always on hear reading the good info. I now have a question for anyone who could help. I live down in south central AZ where it is usually hot year round. I developed my 7mm RUM load in august and early september trying to catch the cooler times of the day if I was lucky it would be 87 to 90 degrees. My load is 86 gn of IMR7828 with federal 215 and 150 scirocco I averaged 3360 fps I shot the other day in temps of 65-67 degrees is it normal to lose 130fps in cooler temps, and would I be better off developing my load at closer temps to what we would most likely see during our fall hunts. Thanks for any info.