Hand Bag

Hand Bag
What part of my hand should hit the speed bag?

I get the rhythm and everything and my left hand held speed runs really smoothly, stock market moves in a very linear course. But every time I use my right hand (alternating and even with one hand), the speed bag and starts losing control to crumble, so it is impossible for me to strike again. Does anyone have any clues about what is happening?

make sure your wrist is in the correct position. may be holding your wrist too tight, or let too loose. make sure you have a hit now? if you has a coach, you should ask.