Introduced in 2007, the 375 Ruger Compact Magnum (RCM) uses the same case as the 300 RCM. As such, it works in a standard-length action but owing to the significantly larger case (same diameter as the belt of standard belted magnums), it has similar usable capacity to the longer 375 H&H Magnum. Being a conventional rimless bottlenecked case, it also loads into a box magazine more easily and feeds through a typical bolt-action more smoothly than any belted-magnum round can. Obviously, this makes it a superior choice over the 375 H&H in every possible category. While I am into nostalgic chamberings in a big way (the, circa 1885, 22 Hornet is among my favorites) everything has limitations and realities. If I were going to Africa and intending to carry a gun that shot 0.375-inch diameter bullets, I would prefer the 375 Ruger for the noted reasons. To me, ease of magazine loading, ease of action manipulation, and a shorter bolt stroke are all issues that matter and are important. My frustration with loading belted-magnum cases into a box magazine gets worse every time I do it. It just reminds me of the inertia in the Gun Industry that I best sum up with the following paraphrase, the logical equivalent of which I have heard proudly proclaimed by dozens of gun-makers: We have been doing it wrong for 150 years and we will continue to do it wrong! The 375 Ruger has a lot to offer. Excepting the not-insignificant nostalgic factor, with the best modern components, it offers everything the 375 H&H offers and it will do everything the older chambering will do. For those wanting to use this bore size for long-range shooting with single-shot loading of over-length rounds, both chamberings offer impressive performance.