I am shooting a 50# hickory, 68" nock to nock @ 27". I'm using 8 strands of irish linen on a continuous loop. How durable is sinew or rawhide in comparison to the linen. I allready know I will lose performance by switching, but i want to be totaly primitive. My nocks are very smooth and string friendly. If all strings are well designed, which would outlast the other under normal circumstances?