Using toys that are too hard can also make you sore . <| sep |> He was doing alright up until 214 , and then he mentioned gyroscopic precession . This is wrong . Gyroscopic precession is not the reason increased lift on the advancing side results in aft flapping . Rotor flapping can be modeled as a secondorder system and you are exciting it about its natural frequency . Systems in resonance demonstrate a characteristic 90 degree phase lag from input to response . The rotor flaps up in front and down in back . This tilts the tip path plane , tilting the lift vector , creating a moment about the CG and pitching the aircraft up . <| sep |> I dunno what it ' s like around there but here in Northeastern Ontario your shots are all under 100 yards . For that kind of stuff a 308 is perfectly fine . I hunt deer with 180 gr 308 and would be fine with taking moose with that also . If you were pushing out to 200 yards 3006 might be something you consider and beyond that 7 mm rem mag is probably what you want . Think about where you are going to hunt and the type of shots you will take .