I may end up reloading reduced loads like I do for the 38 special for him. Similar to what you have.Reliability is not the problem, battering is going to be the potential issue.
16 lbs. is about as low as you want to go. That is what I use for a bullseye gun shooting 200 gr. wadcutters going ~720 fps, so that's quite a step down from 230gr. at 830 fps. I don't know at what point you start battering the gun, but I have to think you're there.
Something like the 6gr Longshot load here.