Gee, replies so far are interesting but a little short on a some engineering references...
As in, how do all the [heavier] 6.5, 7mm, 30 and even larger caliber bullets work in a 1x10 twist? Can you cite a controlling formula...?
An engineer, is there an engineer in the house?
Do a google search on "greenhill formula".
The twist rate depends on the
length of the bullet, not its weight. You can shoot 130 grain+ bullets with a 1:10 twist in larger calibers because since the bullet is larger in
diameter, it doesn't have to be as
long for a given weight.
