There are a lot of different reasons fer a board bow givin up and breakin. I personally have perfected about 6 of em (Breakin) and am still workin on the list. I agree with the others, need more info. and possibly a pic or two. One of mine is Impatience, I get in too big of a hurry to put a string on and see what she looks like, without gettin the floor tiller right first. Another of my patented moves is to pull the bow to a designated point durin tillerin without pre flexin the bow multiple times before I try and draw the bow to that point. I could go on, but ya get the idea. Some of the reason fer a Board Bow breakin, could be the wood itself, but in my case most of the time its me that is the problem. Good Luck on the next try and take the others as lessons, once ya figure out jus whats happenin. The Good News is Pecan like Hickry is great fer Bar-B-Quen a Rack a Ribs!!!