Thanks all, given me a lot of variables (I designed a shooting machine that could take most of these into account, except for loose style).
Thanks Yew (or should that be "eye thank yew"
) for the test idea, it's obvious when you think about it!
I could technically generate a lot of test data like that, might try that out actually, if I ever get the time!
And thanks Hawkeye, I thought that there would be an eventual downside to having a super-heavy bow, which is partly the reason I started thinking about this in the first place.