How do I calculate holding weight from let-off?

Multiply the peak draw weight by the share that is left after let-off. A 70-pound bow with 80 percent let-off leaves 20 percent, so you hold about 14 pounds; with 85 percent let-off you hold about 10.5 pounds. Your exact holding weight also depends on your draw length and cam settings.

Is 90 percent let-off better than 80 percent?

Not automatically. Higher let-off makes the bow easier to hold at full draw, which helps on long holds, but some archers find a very light holding weight harder to keep steady through the shot. Many target archers prefer a little more holding weight for a firmer wall. Try both if you can.

Is there a let-off limit in competition?

World Archery's target and field rules set no let-off limit; they cap peak draw weight in the Compound Division at 60 pounds instead. Other federations and hunting regulations have their own equipment rules, so check the rulebook or regulations that apply to you.

Let-off

Let-off is how much a compound bow's draw weight drops between peak weight and full draw, usually given as a percentage. With 80 percent let-off, a bow that peaks at 70 pounds leaves you holding about 14 pounds at full draw. The cams create it, and it lets you hold and aim far longer than a bow without let-off.

Szczegóły

As you draw a compound, the weight rises to a peak and then the cams roll over and the weight falls away into what archers call the valley. At the end of the draw you settle against the back wall, where the draw stop or the cables stop the cams. The weight you hold there is the holding weight, and let-off is the share of peak weight you no longer have to hold.

Let-off figures are calculated from peak weight, so they are easy to compare: holding weight is peak weight times the share that is left. At 70 pounds peak, 75 percent let-off leaves about 17.5 pounds and 90 percent about 7 pounds. Many modern compounds list let-off somewhere in the 75 to 90 percent range, and some cams let you adjust it with a module or the draw stop.

More let-off is not automatically better. A very light holding weight is relaxing to hold but can feel soft, and some archers find it harder to keep steady tension into the shot, especially with a back-tension release. A little more holding weight gives a firmer wall to pull against. Try different settings, and check the maker's chart before changing anything on the cam.

World Archery's target and field rules cap peak draw weight in the Compound Division at 60 pounds but set no limit on let-off. Other federations and hunting regulations set their own equipment rules, so check the ones that apply to you.

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How do I calculate holding weight from let-off?: Multiply the peak draw weight by the share that is left after let-off. A 70-pound bow with 80 percent let-off leaves 20 percent, so you hold about 14 pounds; with 85 percent let-off you hold about 10.5 pounds. Your exact holding weight also depends on your draw length and cam settings.
Is 90 percent let-off better than 80 percent?: Not automatically. Higher let-off makes the bow easier to hold at full draw, which helps on long holds, but some archers find a very light holding weight harder to keep steady through the shot. Many target archers prefer a little more holding weight for a firmer wall. Try both if you can.
Is there a let-off limit in competition?: World Archery's target and field rules set no let-off limit; they cap peak draw weight in the Compound Division at 60 pounds instead. Other federations and hunting regulations have their own equipment rules, so check the rulebook or regulations that apply to you.