Got a chance to shoot some reloads through a chrono today. It is my first time doing this. My guestion is,would temperature have a noticeable effect on velocity? I shot some 9mm,115g,Berrys plated rn over 4.5 tg through my p89. Primers were cci,oal was 1.145. These were just some rounds I made up to see how they worked in my guy but got a chance to shoot them through a buddies chrono. They were all in the 1100 fps range. Just wondering about if the temp would effect it much. It was about 19 degrees out with about 15 mph winds. Any info would be greatly appreciated. Not worried about making any power factor yet but will be in the future.