Limits to maximum feed speed, and increasing?

[SlartyBartFast]

I'm not going to question the calculations, you know the math as well, frankly better, than I do. Let me ask this - why does the ball have to be at 300FPS and out of the barrel before the next one is fired. It already has its "air charge" that is bringing it up to speed, if the bolt/valve was closed couldn't another ball be dropped and fired without effecting it?

The ball is accelerating as long as the air pressure behind it is greater than the air pressure infront of it.

Opening the breach would release all pressure behind the ball being shot.

So, you can't open the breach to feed the next ball until the prior ball has reached it's final velocity.

Unless, you've dsigned some pressurized/hermetic feed system, which probably wouldn't be able to work unless you were doing the equivalent of sending pressure into the loader to propell the ball out the barrel. And people think Mags have bad efficiency.