I need some input

[Holm-Made]

My bows have been coming out 6-8# heavy.  I thought it was because I was putting stabil core under each veneer. (Still keeping the same total stack height). Maybe it is the new rolls of glass?   You got me thinking.

[Crooked Stic]

as long as you reduce the core the same as the stabil core taking its place it should not raise weight. I would think that BP has a big enough customer base that they should at least try to get con sistancy from roll to roll

[kennym]

When I started using bp I found I had to add 5 lb to stack to match Gordon stack , the last roll that I used a little from I was coming in heavy so I have been trying to figure out what was going on.

I built a tester today and checked several Gordon to get a kind of standard , then checked a pc of bp from the roll I'd been getting heavy on. It was  some heavier , about like .003 thicker Gordon's by my estimation. So that would be like adding .006 worth of glass ...

I also checked a pc of edge grain maple .040 lam just to see how it compared to glass.

My final theory is:  between the stiffer bp and the 5 lb I'd been adding for the earlier bp is where I was getting the 10 lb over on bows .

[attachment=1,msg2911426]

[attachment=2,msg2911426]

[kennym]

The bp .040 came in about 1/3 of the way up to the .050 Gordon's , the bp .050 and Gordon's .050 were identical .

[Crooked Stic]

I am SO confused.  I really hate the guessing games sometimes.

[Mad Max]

So the edge grain maple added weight also ??????????

[kennym]

Sure but was just checking its stiffness compared to the glass. Prob shouldn't have even mentioned it. LOL

Edited to show that...

[Mad Max]