Anyone know how to accurately calculate bow damage?

[Gensokyo]

Tested with and without armor, there is no armor penetration for arrow unlike spears/sling
(30 for spear and 20% for sling I think, 90dmg without armor, around 20 with full armor, didnt tested a lot thoses 2 weapons)

All types of arrows? I'd assume metal arrows should at least by default have SOME armor pen.

[Irrek]

There is armor penetration, but you can ignore it (5%), at most it will be 30 or 40 damage when people have 1-2k..

(used q10bow because my armor are bad )

Without armor:
https://gfycat.com/AcrobaticThinBlackbuck
((50 * sqrt(11,5/10) + (60 * sqrt(235/10)) * 72/100 = 248

With armor:
https://gfycat.com/FrighteningSickIcelandicsheepdog
((50 * sqrt(11,5/10) + (60 * sqrt(235/10)) * 68/100 = 234.41
234.41 * 0,05 = 11

same with metal arrow:
https://gfycat.com/AdolescentKaleidoscopicHoneybadger
((50 * sqrt(11,5/10) + (70 * sqrt(235/10)) * 58/100 = 231.23 (aim is a double, not a int, but i only display the first 2 digits on my client that why there is a little dif here)

https://gfycat.com/ExaltedBossyFantail
((50 * sqrt(11,5/10) + (70 * sqrt(235/10)) * 58/100 = 231.23
231.23 * 0.05 = 11.56 (~12)