Playing 5-10 with an occasional $25 straddle

Hero on the button with QQ (2400 effective), 2 limpers (who are massive fish), MP ($2k) makes it $75 we 3 bet to 275, limpers fold and he clicks back to $650

first time playing with a villain, Asian guy probably in his early 30s - wasn't a nit.

What are thoughts on jamming vs. flatting?