That’s very interesting; it seems to have a progressive twist rate. I assume that this is from a large bore armament of some kind? I believe that gain twist is sometimes (usually?) used on artillery. (See: https://www.youtube.com/watch?v=KI-_CtmOzFs)
Rifiling can’t have too tight of a twist or it will cause overheating, jams, and other negative effects on the rounds. The same twist is (at slightly different profiles) used on most modern firearms and artillery.
That’s very interesting; it seems to have a progressive twist rate. I assume that this is from a large bore armament of some kind? I believe that gain twist is sometimes (usually?) used on artillery. (See: https://www.youtube.com/watch?v=KI-_CtmOzFs)
Rifiling can’t have too tight of a twist or it will cause overheating, jams, and other negative effects on the rounds. The same twist is (at slightly different profiles) used on most modern firearms and artillery.