So I was looking up some reloading info, to steer me towards my next rifle.. and I noticed something funny. All of the RUM cases, which are all based on the .404 jeffries have a base to shoulder length of 2.387".. with the exception of the .338RUM, which is shorter by about .090". So why make this case shorter than the rest of them? It seems that with the right recipe... you could try and make it outperform the .300RUM, but with less capacity?