This plethora of "boutique" cartridges with their esoteric advantages is great for those wanting some real or perceived advantage over the established cartridges, but most lack in being widely available or relatively affordable. Even the parent cartridge, the 375 Ruger, is a rare sight on the shelves. I have my own share of wildcats and oddball cartridges, but I reload and the parent brass for the ones I have is readily available for conversion, thanks in some part to Starline. I understand the advantages of not having the belt the 300 Win Mag has, but it is readily available on the shelves, besides, it is good enough for the US military to adopt as a sniper round, and they have created a bunch of cartridges, 30-40 Krag, 30-06, 308/7.62x51, 223/5.56x45, 50 Browning, 45 ACP, and more. To each his own and that is one of the things that makes America great. Some have filled a previously empty niche and seem to have caught on like the 204 Ruger. Others seam to be lingering, the WSM and WSSM come to mind. Time will tell if any of them has any stamina in the marketplace, but I prefer the more common established cartridges. Just one guys opinion.