Theoretically, a bigger hammer is usually better - but you and I must separate theory and reality and be objective about our own capabilities, our own recoil limits, and how much time we are willing to invest in shooting practice.
COL, USMC Retired
Page 495, Safari Rifles II
I know I have emphasized in this book that, in terms of effectiveness on game, the bigger the caliber and the heavier the bullet, the better - but only if you can handle the recoil. A well placed shot with a .375 H&H is immeasurably better than a badly placed shot from a .458 Lott or .460 Weatherby.
Page 318, Rifles For Africa
South African hunters tend to be minimalists when it comes to caliber choice, and many scorn the use of a .375 on non-dangerous game. I am often asked why I use mine for this purpose, and I have a stock reply: "Because everything I shoot with it falls down." With the right bullets, the .375 takes the doubt out of hunting. I have so much confidence in it that I am more relaxed when I hunt, and I enjoy it more.
Page 176, Rifles For Africa