Maybe 2 fps....this comes from otherpeople testing the speed dif,I beleave one guy just about lost 3 fps but the norm is 1-2.......
Ive used the WB since it came out on the market and havnt looked back.......They also did mud,sand.slush,water,Ice and snowit didnt effect it enough to make any big differance.Ive never used a dropaway but I think there are afew things that I wouldnt want in it when out hunting.........Kinda like hunting with a recurve it's pretty much maintanance free.....