Muzzle rise depends on a combination of factors. The first is shape of the stock ie: pitch, drop at the butt and weight, while the second is how it is held.
: My most accurate offhand position shooting with the .458's and even my new .375 gives a rise of a good 45 degrees and it's entirely due to how I hold the gun that causes that.
: I can hold the rifle so it barely rises, merely punching straight back, but the 'joilt' is fearsome for me, and promotes flinching. Relaxing and letting the muzzle climb, reduces back-bite and promotes accurate, first round kills - for me. Everyone must find his/her 'best' position and hold.