[quote=@ImportantNobody]
Based on my intense research (google front page) I have determined that pounds of force in a punch could be similar to deadlift pounds. So for example of the "normal human" tier of my tier list I have:

--- Below 300 (Average)
--- 301 to 600 (Trained)
--- 600 to 900 (Peak)

This all counts as tier 1 with lower, mid, and upper tier separate for further distinction. So for example, a normal person off the street could punch with 300 pounds of force or lift 300 pounds in a dead lift. Does this seem like a valid conclusion? The main problem is that for peak human punches it seems like they could do over 1,000 rather than 900, but I like how the numbers line up this way and can easily adjusted to higher tiers.

Or perhaps I can go by 400s and not 300s to make the peak tier 1 higher level. Lifting 400 pounds is a little harder for the average joe, unfortunately, if I'm thinking correctly.
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I just wouldn't try to tie them together that much since a good punch is really using different parts of the body from a lifting force. I also know they aren't really tied together from my karate instructor's instructor who was unlikely able to lift much more than 200lbs but could consistently measure a punch from 1500-2000 ppsi.

EDIT: Do note this is assuming he was able to get a good stance on his target.