When I decided to build a 338 rcm and subsequently a 6.5x338 rcm it was solely on the features of the design and expected function and performance of the 338 rcm case. In hindsight, I too ignored all the marketing jibberish. With that said, I'm very satisfied with the 338 rcm cartridge. Now, if only more powder was readily available that I could reload a little more frequently...
