2 SINGLE CAM. Use the same basic process as above, except....Set the tiller using string pulled tight from axle to axle as mentioned above...THEN... make the marks on the cam this time AT FULL DRAW. Now adjust according to which one starts to go forward first. This one will seperate the men from the boys, or tell you if you are overbowed. Again be sure your nock is set at 3/16" above dead center and have an arrow nocked at all times and pointed in a safe direction. Also be sure to use YOUR release.
How would using tiller to adjust timing on a single cam work? On my single cams the timing position is measured with the bow at rest. Changing tiller does not affect it's position. Changes to timing are made by adjusting cable and string lengths on a modern single cam.
HINT>>>> This one I saved for last because I didn't want crucified yet.....Bare Shaft Shooting is OVERRATED....who hunts with bare shafts????
Using that logic - who hunts big game with field tips? Yet, many tune with them. I'm guessing all your tuning must be with broadheads? Actually, that's not a bad idea as long as you don't bare shaft with broadheads.
TUNE IT WITH WHAT YOU ACTUALLY SHOOT. Yes, Before you flame me up, I know the reasoning...but still, why check all those points when fletching CHANGES THE SPINE ANYWAY. Do you really think adding the wt. and drag on that shaft doesn't change things???
No flame here, just disagreement. I've bareshaft tested hundreds of arrow groups. I use to add an equal weight of
masking tape to the fletched area to make up for the lack of feather weight. That is, until I realized the 5 grains was insignificant and they flew and tested the same. If you're using some heavy 20 grains fletch, I would recommend adding the masking tape. It works. There is very good reason to bareshaft test - it enables you to easily get broadheads flying right with fletched shafts or bareshafts. In other words, the broadhead tipped arrow will not plane to a different point of impact.
How a person can get proper spine from a chart and paper holes is beyond me. I've never been able to do it and I don't see anyone else can. I can get close, but close doesn't cut it when shooting broadheads - literally.