If you were only planning on playing 1000 hands in your total BJ career, then you are GAMBLING no matter what system you use. The NO for most 6 deck games is usually upwards of 10,000 rounds I believe, so to expect to win in only 1000 hands using ANY system is wishful thinking. Honestly if I thought I was only going to play 1000 hands in my whole life, I would probably use some sort of progression system too, and take the risk of hitting that reallllly bad losing streak before my 1000 hands are up. BUT, since I play 1000 hands a day multiple times per week, I count cards and use other advantageous strategies.
On a 1000 hand weekend, using a progession system may possibly lose more, less, or the exact same amount of money as flatbetting. You really will not have the amount of hands necessary to justify if it's a "powerful system" or not, and you are doing nothing but gambling.