I can appreciate that the rifling might cause too much damage to the ball for recycling and the lack of rifling on my repro' pistol is an advantage. I think the 28R will be more forgiving of a bit of distortion than the LP55R because of the nature of the magazine. The Schmeisser detachable magazines rely on the ball shot being within a narrow diameter range and even a slight broadening can stop the ball leaving the magazine and cause a jam. On the other hand there seems to be more room inside the feed tube of the 28R. Still it is worth trying a soft target to catch the pellets (I use a cardboard box stuffed with an old towel) and checking out the reusability of the lead balls.