RE: How exactly do you group tune?
Rick-
Here's what you do--
Go out and put a + on a target butt with electrical tape or whatever. Step back to 20 yds, and shoot a group at the center of the +. Adjust your sight till you hit center. If your group is large, after making sight adjustments to hit as close as you can to the center of the +, make SMALL adjustments to your rest or nocking point and shoot another group. If needed, shoot another with more SMALL adjustments. Continue this until you are satified with your group size. Then check at 30, 40, whatever yardage you want, and adjust accordingly if your groups wander to right or left or open up more than you feel is "normal". Always take into consideration your individual skills and abilities. If you know you shot a poor group, do not count it. Do NOT rush this process, and if you get fatigued, quit and continue again later when you are refreshed.
To "supertune" (twin cam only) you simply go to the next step of the group tuning process. You shoot your initial group at 20 yds, then do it again, only this time creep forward slightly (about 1/8" or so) with the second group. If your impact point hits higher or lower than the original group at normal anchor, your bow needs a twist on the cables to "bring it in". If you hit high, twist the lower buss cable 1/2 turn. If it hits low, the upper cable. Continue this process until you have the same impact point heights regardless of creep or overdraw. You do not need to go to 40 yds on the supertuning process. You'll be surprised how well you will consistently shoot with a group tuned/supertuned bow. Solocams cannot be supertuned because they have no opposing cam with which to balance the system.
Hope this helps, I'm sure it will if you take your time with it. <img src=icon_smile_wink.gif border=0 align=middle> Good shooting, Pinwheel 12