There is a formula for this, anyone know some links or data?

Can this data be used to tailor a load for a given rate of twist in an existing rifle?

WJ - Here is a simple calculation site - http://www.realguns.com/calc/riflingtwist

Here is a complex calculation site - http://www.lascruces.com/~jbm/ballistics/drag/drag.html

[ 08-20-2002, 17:34: Message edited by: Dutch ]

If your thinking about conventional sptizer type bullets then http://www.bergerbullets.com can fine tune it for you.

But consider that a fast twist is the side to error on and that if monolithic bullets catch on they will require a faster twist for the same weight.