25/50 set vs reg

I'm just not sure what to do here, it seems really hard to get value from him with what i did. Should i use alternate raise sizing on the flop, or maybe lead?
PokerStars No-Limit Hold'em, $50 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($3605.50)
MP ($8292)
CO ($5800)
Button ($14887.50)
SB ($4237)
Hero ($5422)

Preflop: Hero is BB with 7http://www.flopturnriver.com/phpBB2/...miles/club.gif, 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif.
2 folds, CO raises to $150, 2 folds, Hero calls $100.

Flop: ($325) 7http://www.flopturnriver.com/phpBB2/...es/diamond.gif, 5http://www.flopturnriver.com/phpBB2/...miles/club.gif, 8http://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
Hero checks, CO bets $250, Hero raises to $850, CO calls $600.

Turn: ($2025) Qhttp://www.flopturnriver.com/phpBB2/...miles/club.gif (2 players)

Final Pot: $2025

Spr on flop raise is kinda bad but i like the size

Bet turn obv.

$1350 on the turn?

without any metagame just bet it

I just bet here, cause any overpair etc cause put you on tons of combo draws (56,67,68,89,79,66) that might c/r this flop and bet this turn that they are still ahead of.