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Hawg Haggen · February 4, 2013, 05:09 PM

Progressive means its deeper at the breech and shallow at the muzzle but still has the same twist rate. Then there's gain twist rifling that gets faster at the muzzle

February 4, 2013, 05:09 PM	#11
Hawg Haggen Senior Member Join Date: September 8, 2007 Location: Mississippi Posts: 10,225	Progressive means its deeper at the breech and shallow at the muzzle but still has the same twist rate. Then there's gain twist rifling that gets faster at the muzzle __________________ http://blackpowdertimes.com/index.php