DM, I'm assuming your Shafer is a recurve and cut at least to center. With wood arrows cut to 29", you will want at least 65-70 and maybe 5lb more. Whispering Wind has a very good spine chart that will help you figure the correct spine. For you first set of woods, I recommend you spine on the high side and cut them long. Shorten the shafts until they shoot bullet holes or bareshaft well. It's always easier to deal with too much than not enuf.