[Montell C. Williams]

The rate of twist controls how fast the bullet spins, the shorter the bullet in relation to its diameter the less twist it needs to be stabilized, usually a round ball has a rate of 1 turn in 66 inches, a conical like a T/C maxi ball would be best stabilized with about 1 turn in 35 inches and so on, thr rate of twist is usually a compromise so various weights of bullets can be used with reasonable accuracy.

Remember the longer the bullet in relation to its diameter the faster the twist needed.