I did opposite movement with the rule of 50 for 6 weeks.
I used about 55-65%. Sometimes I did fall little short (total 43 reps for ex.), but usually could hit all 50 reps (with squat and press I did this in every workout). DL was definitely the shittiest movement to do.
Nevertheless, it worked. I got new squat PR (did jokers for squat and DL at 6th week), and hit new rep PR's in DL and Press. I also gained mass.