Effective range

[Skvez]

What is the effective accurate range that an amateur can expect to get with each of a slingshot and longbow and a crossbow?

I'm looking for the range where someone with a little training can accurately place the ball-bearing/arrow/bolt within a 10cm circle.

In the Slingshot channel Jörg Sprave builds some pretty impressive weapons but he seems to shoot at targets that are only 5 or 10 meters away.

I'm *not* interested in what an Olympic athlete can achieve with a £10000 weapon. I'm interested in what most people can achieve with limited opportunity to practice with an affordable weapon.