Just a side thought, I wonder where the idea of a PRB isn't effective came from? When I first got into ML that was the only thing people used now people speak as if you're better off w/a creek rock. Not that it makes any difference to me just curious...
I think it's just a matter of prespective. When I first got into muzzle loading in the early '60's patched balls and black powderwere about all we knew. Wouldn't even have considered a shot beyond 50 yards. Thought RB's were real killers.
As ML technology progressed, first with heavy conicals which extended effective range - then with sabbotted jacketed bullets which extended it even more, what is considered "ML range" has increased greatly. So, with current state of affairs being that 150 yards is considered by most to be a perfectly doable ML shot, round balls pale by comparison. Those who hunt with PRB's and know their limitations, know where and how to place the shot, and have the tracking skills necessary, balls are still viable. For the average Joe who shoots a ML a few times before the season to sight in, then hunts, PRB's are not the best choice.