Variable chamber CO2

A stronger spring will yield more power but only to a point. An incremental gain as you are stuck with a fixed volume of air to compress, a fixed transfer port size and a pellet that’s going to start moving when a certain pressure is applied.

Better to buy a magnum springer if that is your performance goal rather than try to make one of lesser capabilities something it’s not.
What’s the internal difference between a regular springer and a magnum, besides maybe bigger springs and xfer ports? Are they made of the same stuff or something stronger, etc?