One thing to think about with a longer, wider cylinder that has more volume, is that if there is too much volume, you may need an extra-long inner barrel to match the cylinder to barrel to bb weight ratio. But this is OK because you can then port the cylinder. So, you can then shorten the barrel to a desired length and then port the cylinder to have the correct amount of air for the barrel and bb weight. The advantage of this is that the piston will accelerate more before compression starts. Thus, giving you very high fps with a lighter bolt pull.