Lighter tips is the next thing. I suspect you could remove a good bit of material from those recurves. Narrow them down. Look at how much a Turkish hornbows tip 'steps in' in width at the base of the curve. A standard Turkish bows tip is around 10 - 12mm wide and 17mm thick, that'#s with draw weights of over 100#'s.....tips can be much svelter () than you think.
I don’t think a Turkish Flight bow can be compared to a broadhead bow that is not to be draw past the back of the handle. I could be wrong. Do you have a Turkish 50 pounder. If so shoot a 450grain broadhead arrow not drawing past back of bow and report back the shot distance. I’m curious. Arvin
I didn't say a Flight bow specifically. The Turks made warbows too
The tips on both were practically the same. Turkish bows shoot both very light flight arrows and heavy hunting weight arrows very well indeed. The heavier arrows of course make the bows more efficent. So broadhead or not makes no difference. Same with overdraws that wouldn't make any difference in how the bow transfers its stored energy.
I have a few around 50# and the performance is right up there
I haven't tested them in years so can't quote you absolute figures but at least as fast as any selfbows i've made.
I've played about with reducing tips a lot and know you can remove some weight from yours