Fairly long cartridges just don't work too well with the auto ejecting top-breaks. If the action is opened slowly the extractor can snap back down and cause the long case to sort of "cock" askew before it clears the chamber, and binds the cylinder momentarily. This happens even with the shorter .38 S&W cartridges. And loaded rounds will drop back into the chamber causing the extractor to drop onto the top of the head of the case instead of gripping the rim.
After some experience with both top-breaks and hand ejectors (with swing out cylinders) shooters usually eject modern revovler muzzle up and gravity helps clear the cylinder of cartridges. Not so with the top-breaks.