Got a Real World Weapons or Armour Question? Mk XII

[Spiryt]

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but allows arrows to fly farther (record with a composite bow is something around 800 meters, far beyond effective range).

Those records are quite literally records though, and they were specifically attained as a sport performances - bows and arrows optimized to fly as far as only possible.

Probably no one was doing it with crossbows on any larger scale.

And generally, arrows and bolt weight actually tended to be similar - for similar energy, similar projectile weight was used.