10/20 Flopped Set OOP in 3bet Pot Bad Turn

[Sp00n]

I was playing on a site that the HH converters don't like so you'll have to just read what happened, sorry.

4 handed with one fish(loose-passive, 45/12 over 600 hands or so now) with around 4k, I cover. He raises UTG to 80, everyone folds and I 3bet with QQ to 380(this raise size ok considering stacks?) he calls.

Flop KQTr

I bet 600 into an 800 and he calls. His call could mean a King, Queen or Ten or Jack... and maybe just an ace.

Turn J(Pot $2000, we both have around 3k behind)

Hero ???