No, no, this one is pretty efficient as is, plus a lot of thought went into maximum muzzle velocity for the best use of the 400 grain Woodleigh bullets. IMHO a 40 degree shoulder has no place in a DGR.

Design criteria is: Efficient use of the bullet, 50,000 or less PSI, feeding to perfection, long grip of the neck on the bullet to take care of slip while under recoil, managable recoil in a 9-1/2 pound rifle, iron sight use under 200 yards, with a design use of 100 yards and under.

Shorten the neck, blow the shoulder out, put the base of the bullet way down in the powder space, and you will experience higher pressures for equal velocities. I think the cartridge is called a 416 Remington.

My suggestion for those needing more velocity: Go to a bigger case, keeping in mind what the velocities will do to bullet construction.