I was going through my hands today and was wondering especially about this hand. My general strategy is to bet a high boards quite a lot in these kinds of spots (villain is unknown reg), because i should have a range advantage.

Then i checked out some, what i thought would be reasonable ranges (pfr: 44+,ATs+,A2s-A5s,KTs+,QTs+,JTs,T9s,98s,87s,AJo+,KQo; caller: 33-JJ,AJs+,A4s-A5s,KQs,JTs,T9s,98s,AJo-AQo) and saw that the pfr is the underdog here (48,7% -51,74%). So i was wondering if any of my ranges are totally off, or if this is supposed to be expected.

The utg opening range is really not that wide (about 14%), so i probably must be having the callers range wrong. Can someone tell me where my estimations are incorrect and how the calling range should look like?

Edit: As an afterthought i think a small river raise is a much better option.