Only say 10 years ago it seemed that there were 2 .300 mags, the .300 win mag, and the .300 weatherby, now we have the .300 WSM, .300 RUM, .30-378 wby. I'm surprised at the popularity of the .300 RUM, the .300 WSM isn't as much of a surprise to me, since it gives your a short action .300 win mag essentially, which is nice. But the .300 RUM seems like what we already had, a .300 wby? Was the .300 win mag that bad we needed a .300 RUM? Can you get a .300 RUM that much cheaper than a .300 wby? How much difference is ther ein the price of ammo? Do like the beltless WSM and RUM though, just surprised by the success of the .300 RUM, so the 2nd part to the question, which is the best/your favorite? Any reason why?