Shooting burst photos

After tirelessly trying my hardest to get a burst photo for hours on end I stressfully gave up. After re composing myself after being defeated by my own camera I began doing research into the dilemma i kept hitting and reading through this artical created by Darren Rowse. It because apparent to me that I wasn't the only one who has ran into this problem. 

Basically, my camera was set on manual and I had put the burst setting on, got my exposure near on perfect (quickest shutter speed the camera allowed)  and had a few different angles in mind. Dylan(the rider/subject) roles up. I begin the burst shot. He get roughly 2/3 of the way through the trick and the burst stops. So I go back to the exposure setting lowering the shutter speed in hope that it will prolong the burst speed. It did nothing and long story short I got really agrivated and didn't take anymore photos that day. But I did notice that it was only taking at maximum 7 photos after I pressed the shoot button. 

Going back too the artical, it explains that the size of the file you are trying to take the photo with e.g-raw etc will limit the amount of photos I can take. I think I was trying to shoot on a rawL format or soothing along those lines which only allowed me to take 7 photos on one burst. But apparently, if it's on just raw or another file setting it'll allow me to take more alothough the size of the file won't be near as big.