motorhead... that is kind of strange, so i just run down to the chrony. Mine swings the 8.44 at an average 872 fps with a high of 881 and a low of 869 on a 10 shot string. it also had a maccary kit put on and it has about 750 shots through it... maybe too much moly??? mine uses minimal lube as it was buttoned up by Jan Kraner. But even so when we got her it shot the jsb 8.4 at around 810...