Lift 29.5 draw weight drop

[Akrudup]

I bought a brand new lift 29.5 about 4ish months ago. In that time I have shot it quite a bit. I noticed the bow getting easier to pull back but figured it was just me getting stronger and more used to the bow. Recently I decided to build a in home bow shop so I got a press, draw board and scale all from last chance archery. My peep has started twisting so I know I have some stretch happening in the strings. The bow has 65 pound mods with 85 percent let off, limbs are all the way in so in theory it should be pulling 65 pounds, here's where the problem is. I put the bow in my draw board, hooked up thr LCA 3.0 scale and according to the scale im losing 5 pounds somewhere. The scale shows the draw weight at 60 pounds and let off at roughly 81%. Id expect a few pounds from the string stretch, but 5 pounds just seems like alot. Is this normal to lose that much draw weight? I have new strings coming but id like to wait out the archery season to put them on.

 

[dtrkyman]

Did you ever scale it prior when you first got it? String stretch will add lbs, cable stretch will decrease. It would be a lot to lose from just cable/string settling in!

Add two full twists to each cable and see where you are, double check cam timing and go, make sure you have the proper mods for 65lbs.

 

[Mighty Mouse]

5 lbs isn’t that far off. You should be able to get DW up to spec by adding a few twists to the cables.

 

[camelcluch]

Add the twist to the yoke and leave the cables. One to two in each should get you back.

 

[GreggB]

Check the specs, particularly the axle to axle. If its over 29.5", twist the cables to bring it back and recheck cam timing. Should be good to go.

 

[ResearchinStuff]

That sounds like the exact poundage people lose on matthews when they have gas strings installed improperly.

 

[Mighty Mouse]

Add the twist to the yoke and leave the cables. One to two in each should get you back.

What’s the reasoning behind twisting the yokes instead of the cables?

 

[alexnelon]

What’s the reasoning behind twisting the yokes instead of the cables?

It just seems like that's where the stretch happens on the newer Mathews bows. I think maybe they're not able to pre-stretch the yokes very well or something because it happens on almost every Mathews bow I see.

I bet the string didn't even stretch and just twisting the yokes back up will fix it.

 

[Billy Goat]

Double check your scale.

I have had a lot of issues with LCA scales. And most all scales will read a little different anyways.


Where are the timing holes?

 

[Mighty Mouse]

It just seems like that's where the stretch happens on the newer Mathews bows. I think maybe they're not able to pre-stretch the yokes very well or something because it happens on almost every Mathews bow I see.

I bet the string didn't even stretch and just twisting the yokes back up will fix it.

Interesting. If that’s the case, I suppose it makes sense to apply an initial round of twists to the yokes to shorten them back to spec after their initial stretch. Otherwise, I would opt for twisting the cables so I could avoid the hassle of removing cams.

 

[camelcluch]

The yoke will give a greater effect and not stretch back out. It’s a longer lasting solution. GAS did a video on this.