I have had my .25 Marauder for a while now and finally got a Chrony to test it!! but it left me a little confused...The extreme spread over 32 shots was 26 with a standard deviation of 8.47. But what has me confused is the average FPS was only 734. The factory specs say 900 and i know that is usually higher than actual, but 170 fps seems like a big difference. My gun is completely stock with no modifications or adjustments. It was 25 degrees outside the day i tested it. I was wondering if anybody has tested their air rifle in the cold and if so what wat the FPS drop versus warm weather?