The 260 remington is an updated Swedish 6.5 x 55mm. The 140 grain bullet has the same sectional density as a 180 grain 30 caliber bullet. If you check the ballistic charts, the 260/6.5 x 55 can do everything a 308 winchester with 150 grain bullets can do, and has better terminal ballistics to boot.
No matter what people tell you, the 308 does not have the case capacity to handle 180 grain bullets. If you want to send more lead downrange, use a 30-06 or 35 whelen. If you want more range, period, use a magnum of some sort.
Europeans have been useing the 6.5 x 55 on moose and other large deer for years with no problems. The 260/6.5 can handle any non-dangerous game in North America within 300-350 yards. As for me, I like the low recoil, and I have no fantasies about how accurately I can shoot past 200-250 yards! It's one of my favorite calibers.. Try it, you'll like it! [:D]