I was wondering, what's the lightest aluminum I could get away with shooting? I shoot an 02/ cc+/ pro-tec/ xt3000 at 70#'s with a 30" arrow,100 gr tips and feathers, and I shoot fingers. The most speed I can get out of it with 2514's is 245. I did get 260 with beeman ics 300's, but I really don't like carbon. Any suggestions that are lighter, and that would spine ok with fingers would be appreciated. Thanks.