I just finished running my Beeman R7 ( it is brand new- needs brake in) and my son's 901 through the chronograph.This 901 is unbelievable.# of pumps: 08Pellets: Piranha 10.5gn901 results: 580, 578, 578, 580,582,582,580,580!!!Beeman R7 with same pellets:505,510,489,514,508,518I tried some other pellets with the R7 and it seemed to like the Baracuda hunter extreme where the deviation was smaller but still nothing like the 901. I am hopping that over time the Beeman spring will settle down.In the meantime? I am...pumped!Can't wait to test accuracy results over 20, 30,40 and 50 yards. If I find time tomorrow I will make a you tube vid with chrony results and a shooting session to 33 yards( the max I can get in my backyard.