Just an idea to improve the ballistics but keep the ability to shoot standard brass and fire form.

If the case was given a sharper 32-40 degree shoulder and minimizing the steep body taper, seems a lot of power is probably hidden in there. I have thought of building a single-shot falling block on this caliber.

Considering what Epps did for the .303, I would have thought you may well have a nice project going on there.....