this armchar bowyer's opinion:
I don't really understand the big risers on western recurves... well, guess they give more efficiency for lighter arrows at the cost of less energy storage? Like whip ended tillering or I guess a setback handle. The limbs are still often too wide. And very little reflex, if any. Korean synthetic bows take a lot more stress than most western recurves. They bend more and have way narrower limbs, and are reflexed. A bow with a big stiff handle section but more reflexed and narrow limbs would be faster. guess most western recurves are all about stability or something.
With heavier arrows, bow speed/efficiency with lighter arrows matters less and energy storage matters more, so I guess whatever material can bend the most without breaking would do best?
I have to try compression pine and cordage backings. I would probably try nylon, I can't be arsed to make a ton of sinew cord and nylon seems like it does a little better. Heard some really good things about reaction softwood, but not from many sources. With enough energy storage, could make a great bow for heavy arrows
this was interesting, only the better korean synthetics did better than selfbows