~140lb ohp is not bad. That's probably close to 155lb if you use a barbell. Depending on your age and weight you may be able to run a linear progression for a few weeks or you may have to get on an intermediate plan like 531 or TM or whatever works for you. Do you microload? It's the only way to keep moving up efficiently. If you want I can look something up for you in PPST3 if you don't have that book.

I'm in week 6/7 of OHP TM. Friday should be 170 for 2set of 3. 1x5 ran out in week 4/5.
Now if only I could flipping do a chin up by the end of the year I would be happy.