I respectfully disagree. I believe the necessity of the shell having to turn as it is pushed home would cause some resistance. How much I haven't a clue, I've never been a civil war gunner. However you would have to push hard enough to make it turn as it was going down. I think there would have to be considerable effort. Only my humble opinion with no experience obviously. Regardless I still don't know the reason for converting, even without a twist, isn't it faster to load a breach loader as opposed to a muzzle loader anyway. I am sure there is a reason or they would not have done it.