With the announcement of the new .300 magnum ar today I feel compelled to make this argument. .300 magnum and .338 should not be Cape buffalo and lion guns, they are illegal to hunt dangerous game with in most cases.
My proposal
A .375 h&h magnum bolt action rifle class 8-9
.416 rigby bolt action rifle class 9
.500 nitro express class 9
1-5x24 heavy recoil rifle scope that can only be used on the .375 and .416
Move red deer and gemsbok to class 7
Move water Buffalo, both bison, brown bear, and grizzly to class 8
Make the .300 and .338 class 6-8