The first bow is sinew backed Osage, and the second bow is sinew backed elm. Thanks to Bob Barnes for posting the pics. Both those bows shoot 140 to 145 average. Sleek I am shooting 12 GPP. 25 inch draw 30 lb bows. I shoot gap, and a 30 inch arrow. Those speeds work fine for me at 12 ,15, and 20 yds were accuracy is concerned. Sleek thanks for your kind offer. So now we have a challenge for all of those who may be curious, and experienced bowyers with making a 30 lb bow, shooting a 370 gr arrow at 25 inch draw, and posting the speeds, design , etc. I would love to see your results. The bows above are over built for durability, and longevity, and I know that. That would be another consideration.