I know that you are not supposed to shoot less than 120 or 125 grain rounds out of these guns but had not heard about leading issues. Whatever round you normally shoot make sure you check for unseating issues. I had one of these airlites and really liked carrying it. Hand issues got in the way though.
yes it is bullet pull that is the problem. I put a pretty good crimp in my wad cutter defensive loads, so I may continue to shoot them. I use a pretty stiff load of bulls eye but even still don't get the recoil near the 357 mag.