my x6 was set on 63# when igot it i turned it up to 66.5 shooting a no.7 mod 27in. which could be a little longer with a 407gr hunting arrow i was just gonna ask the guy at the shop to let me run it thru the chrono and he was working alone sat. morning and two guys come in to buy a x force so we just left so i don't no what this is shooting for speed but it sure spits em out,heck of a lot faster than my truth bow and quieter to,this thing sure shoots nice though.......Ted