"416WSM
The case would hold 66 grains of water with a 300 gr Hawk Bullet, delivering over 2700 fps and 5000 FPE at 65,000 psi. AA 2230 would do the trick, without compression.
A deep seated 400 gr Hornady or the like would still leave 52.5 water grains of usable capacity, delivering 2230 fps and 4425 FPE.
I think you are hitting on the real reason there aren't any short action thumpers. Thumpers are for shooting heavier bullets and the heavier bullets are long enough to severly restrict powder capacity, 13.5grs in your example going from a rarely used 300gr 416 bullet to the traditional 400gr bullet. This large a reduction in powder capacity is going to severely restrict your powder selection and overall utility of the round. Most hunters want Long, heavy bullets in their thumpers.........................DJ
