It's not injured, just worn out. I can throw all day, just not hard enough to bust a grape anymore. The muscles can still throw harder than the joint can take though, so I have to throttle it back. You know, from 45 to 30 MPH.
The high 80's left town a long, long, time ago.I'm not worried about how the lube affects case life either way. I just don't think it is enough to factor in. I do want to keep as much out of the inside of the case neck as possible, so will likely lube the bag, then lube the cases in the bag, then size, then tumble, then load.
Does a little leftover lube in the case mouth matter? Dunno, but I am more comfortable with it clean and dry.
