Negative
Bumpy,
Without looking it up, that game should yield the house an advantage of around .60% or .62%. In the long run, with flat betting (bet same amount each hand and take all BS double downs and splits), you are going to loose a little. Of course, like with the short run, you might get lucky and win like you did for a while with that $150 increase to $800. Set a goal and discipline yourself to walk away when you reach it....same with losses....
As for increasing bets....that's been a highly debatable topic on the gambling forums. Personally, I increase my bets on the hand after the person sitting three positions to my right is dealt a deuce on the first card. Without counting, that works as well as any other method! And it is fun when you explain your madness to your tablemates <LOL>
I've tried "card watching" and haven't had a lot of luck with it...especially in a 6-deck game. By that, I mean that after a couple of hands where you see virtually no tens, you increase you bet hoping that a string of tens will show. That just doesn't work reliably. I was watching last night the rerun of WSOBJ in which Wong, Blackwood and three ladies (Charlene, LeAnn and I can't remember the foreign lady's name) were playing for two seats in the finals. I recall watching two consecutive hands fairly early in the shoe where there were no faces or maybe only one or two that showed. Max Ruben even commented on the fact that though the previous two hands were all low, the count (and I assume he meant running count) was just +2....certainly not enough to justify an increased bet. But a "card watcher" would have jumpped on that. Sure enough, nothing spectacular happened on the next several hands.
If you are going by "gut feel" or "feelings" of any kind, call it gas and act appropriately.
I know that is not a very positive spin on betting Blackjack, but I think one should face reality from the beginning. It is a negative expectation game. Played correctly, in the long run, you won't go broke...or at least you will go broke slowly. But in the short term, you can walk away with a large win or you can walk away with a large loss. Most of the time though, you will come close to breaking even over several days of play and have a lot of fun doing it.