RE: 1,000 yard deer rifle...
I have built quite a few 6MM-284's and personally own one set up to shoot the 105 A-Max. I used a Remington "blueprinted" action, H-S Precision stock, Jewell trigger, and a Jeff Lawrence 1:9 barrel. Mine is a little more portable at 12.75 lbs., and shoots 1/4" groups with regularityif I do my part.
About this 1,000 yard business . . . . Although the ballistic coefficient of this bullet is about .500 and they are going around 3400 at the muzzle, the retained velocity at 1,000 yards is only 1675 and the energy is down to 650 ft. lbs. I have seen this load put several elk on the ground so fast, from a broadside lung shot, that one would swear it was a head shot. But at distances in the 250 to 450 yard range. For humane 1,000 yard deer hunting (if there is such a thing), I'm thinking a 7 STW with the 168 Berger VLD would be the ticket.