Hopefully I don't sound like a fool, but I recently purchased a new Diamond Black Ice off the internet.

Would have payed a little extra to buy from anywhere local, but nobody had any left.


Anyways, I know they are adjustable or with a cam change able to change the let off percent.

Just doesn't seem like it's at 80% (where I want it) but want to know what to look for or how to determine what it's at. Could just be in my head, but it feels more like 65-70% to me.



Spoke with a guy at the archery counter today at Sportsmans Warehouse and he told me the little stopper on the lower cam was also part of changing it between 65-80%, but that doesn't make sense. How can lengthing the draw increase the let off?


Thanks for any help...

I know on my Mathews there is a stopper, the cam is actually engraved with 65% and 80% by the screw hole. Not sure how it works, but that's how mine works. Let me know if you want a picture.

Well here's a couple of crappy pics of my cam, never really looked close on a Mathews as my MQ1 doesn't have any adjustments.






60-70 lbs. 29" draw


My old MQ1 is set at 65lbs.

Black Ice is bottomed out and factory sticker indicates 71lbs.

Both feel pretty similar and similar let-off's?

Here is a shot of my Mathews cam.

Yopu adjust the letoff using the draw stop. The draw stop does not adjust draw length really.
If you think the let off is shallow or low, loosen the allen head, slide the draw stop to the + side a half line and tighten it back down. Try drawing it back and adjust by your feel.

Very easy.

Thanks for the responses guys, will mess around with it tonight.

For 80%, should it be all the way over than to the plus side?

tha manual should have that info, or maybe contact Bowtech or whoever makes your bow...