I just bought a 7mm STW that would fit the bill as an excellent long range big game rifle. It's a bit on the "loudenboomer" side, but it's not too bad. I handload to I can tailor the loads to my needs, and at $1099 for both the Sako 75 rifle WITH the Nikon Monarch UCC 3.5-10x50 scope, it was a deal that I just couldn't pass up. The standard 7mm Rem Mag would also be an excellent choice for a "long range" rifle. I think that the 7mm bullet is a very well balanced caliber for combining long range ballistic efficiency with reasonable bullet weights that will still make a nice big deep hole at extended ranges. The .277 bullets of the .270's also fit with this category. A .270Win or .270WSM would all work well. If you handload or can spend big money on factory ammo, the .270 Weatherby Mag is a GREAT performer too.

Mike