O/8 5-10 $500 Drawdown - Normal?

[otctrader]

Lost $500 playing in a loosish O/8 5-10 ring game over the course of about 10 hours; my play was very tight, generally only drawing to the nuts, only playing choice hands pre-flop. Occasionally played a KKxx suited. Did not have ONE flush or straight draw hit, and was counterfeited on at least 75% of my nut lows on the turn/river.

All the major losses were from heavy action pots when I was chasing a draw to the nut straight/flush which didn't hit.

Who was winning at the table? Two or three guys who were chasing bottom two pairs or bottom sets and got them to fill up on the turn/river. Of course, they took down quite a few pots with the unimproved junk too.

Is $500 in 10 hours a reasonable (statistically speaking) drawdown, or just indicative of bad play on my part?