Background:
Don Miller did an excellent article for the Spring 2007 issue of the Black Powder Cartridge news entitled …
A New Twist Rule Applied to Black Powder Rifles. In his very extensive calculation, he determined that the Ideal 375166 bullet has the best ballistics characteristics in a BPCR with a 1:18 twist
It calculated to 17.65 for the 1:18 twist!
See more details over on the NEF Forum ...
http://www.gboreloaded.com/forums/index.php?topic=156235.0
