I have the savage 111 Long range hunter in 6.5x284 norma. According to the hornady HITS calculator, this cartridge can take Moose sized game up to approx 500 yards. I am using reloder 19 and berger 140 vld's and I am getting a muzzle velocity of 2900 fps. The cartridge is suitable for deer sized game out to 1,000 yards, if you do your part.
At 500 yards with the load mentioned above, the figures are: 2274fps and 1607ft-lbs.
The rifle shoots 1/2 to 3/4 inch groups. With a better stock and bedding, it probably would tighten up; my savage in .308 tightened up with bedding and an hs precision stock.