B-50 dacron is fine . BUT the modern materials are better! Sawed off tips.... have you ever sawed thru wood? Can you hear it? How long do you hear that sound before you check where it's coming from? Gentlemen you have probably made more and nicer bows then me, no doubt! Not three or maybe more have made as many strings. period And I have probably shot more, different types of bows than most! I'm not hear bragging, All my self bows have Modern material strings and I shoot the heaviest arrow possible!
I have sawed thru pvc with a nylon boot shoe string, that is possible! A solid piece of Osage, Hickory, White Ash...... have you split wood ? We're talking a solid piece, not laminate or glued. If you have pics of the bows, please show me! And I also ask for the records of the treatment or abuse..ie light arrows, poor tiller, Whatever! Good shootin, Steve