If the volume of 2 rams is the same but one is a shorter but higher bore than there is little difference between the two if the throw of the flipper remains the same by adjusting the lever ratio. A short powerful flip can be achieved through a longer stroke arm simply by moving it down the ram.

You can't magic up more energy for the same volume of gas expanding, so don't fall into the normal trap of thinking a huge bore is the be all and end all. A longer ram with the same volume mounted further down the flipper arm for an equal flipper throw will kick out the exact same force on the point of the ram. The trick is getting the right balance of stroke, bore and the lever ratio.