Originally Posted by benchracer
So you REDUCED case capacity, REDUCED pressures, and INCREASED velocity? Pardon my cynicism, but I am waving my BS flag. There is no way that all three of those things can be true.
Well, don't jump to conclusions yet. I have just started testing a similar design myself in 7mm (The 7mm GT). It is a shortened WSM case, to fit in a SA with the bullet seated long.
Anyways, the case capacity is 69.75 grains filled to the top (65.2 to the shoulder neck junction) I worked loads up to 58.5 grains of Hodgon 4831sc and got 2839 fps with a 29" barrel.
The funny thing is that, I had more case capacity left, there were no pressure signs at all! And all of this is with the 180gr Berger Hybrids jammed in the lands.
So, yes it may be possible to reduce capacity, and pressure at the same time. Although, velocity is pretty much affected by pressure. But you may be able to use a faster powder to essentially raise the pressures back up. Getting a more "efficient" burn, creating greater velocities.
(If that makes sense.)
So they may really be on to something. Keep us informed! Sounds promising to me!