05-29-2015, 04:38 PM
John, my thinking may be wrong, but I would think adding rifling would decrease the pressure somewhat like a bullet with pressure bands cut into it. On the other hand the pressure may increase some due to the twist adding resistance to the projo as it travels the bore. This would be an interesting experiment to say the least. This is all theory until someone tries it, and I think we all present good points, but I'm kinda back pedaling on my comment last night about building more pressure in a smoothbore, since reading ur last two posts. Hard to say. Any takers on the smoothbore trials?
Richard
Richard