Wreckless 55 oop? 100nl

I don't have any reads on these guys, but I want to know if these are wreckless plays or what? I know that in hand 1 I put the guy on a bluff, hence the call, check call line. Hand 2, I was trying to rep a big hand by pushing a scare card on the river. The important thing though was there was a lot behind both of us.

Thanks.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.50/$1
7 players
Converter

Pre-flop: (7 players) Hero is BB with :5h: :5c:
UTG folds, UTG+1 raises to $4, 4 folds, Hero calls.

Flop: :2s: :7h: :4s: ($8.5, 2 players)
Hero bets $6, UTG+1 calls.

Turn: :3c: ($20.5, 2 players)
Hero bets $7, UTG+1 raises to $24, Hero calls.

River: :7c: ($68.5, 2 players)
Hero checks, UTG+1 bets $38, Hero calls.

Results:
Final pot: $144.5

Poker Stars
No Limit Holdem Ring game
Blinds: $0.50/$1
8 players
Converter

Pre-flop: (8 players) Hero is SB with :5h: :5d:
UTG raises to $4, UTG+1 folds, MP1 calls, 3 folds, Hero calls, BB folds.

Flop: :8s: :4s: :6h: ($13, 3 players)
Hero bets $7, UTG calls, MP1 calls.

Turn: :4d: ($34, 3 players)
Hero bets $12, UTG raises to $30, MP1 folds, Hero calls.

River: :ks: ($94, 2 players)
Hero is all-in $123.

Results:
Final pot: $217

Hand 1: Your turn bet screamed weakness so you got raised. Looks like villain has an overpair to me. If you thought he was weak, you should have bet the turn hard since you picked up the OESD. That was your chance to take the pot without a showdown or see how strong is hand was. As played, you can't tell what he has and it is likely that you lost the hand. In addition, your line doesn't scream set so villain must have picked up on that....sets don't bet out on the flop, esp on that board.

Hand 2: I've seen this line a lot recently. Seems to be the favorite bluff line nowadays. I used to fold to these allins on the river but I mostly call them now. My bankroll has thanked me. 90% of the time, this is a bluff and if villain is aware, he will call you with any decent hand. It is an effective line against most newbie players, but not against regulars. Just be careful...