I honestly don't think you can buy a bullet that will give you the massive damage that you seem to seek at 1000 yards. the trauma you see is caused by the velocity of the impact. if you got a bullet to do the same damage at 1K you normaly see at 300 yards, at 500 it would blow the bejesus outta them.
I most of the time hunt deer on the timbered ridges and try to keep the shots at 800 or less, here is what I try to achieve.
I want the deer down as soon as possible, because I have saw deer be DRT in the scope, but still looked for almost an hour for them, when you get to where you think the deer should be, no matter how well you mentaly mark they're location, nothing looks the same when you get there, so I hold center shoulder, I get decent expansion and deliver all the shock possible at that range into the target.
you mention berger vld's, I shoot them in my 6.5 gibbs, last year I shot the yellow box 140's, they shot well, performance was on par with the accubonds as far as exits, this year I shot the orange box 140's, shot 2 8 pts with them at 457 and 493 yards, hit liver on both bucks because of the rut they never stood still for long, bullets hit a rib going in, neither exited, livers were gone, guts a bloody mess but not a good blood trail. Next year I'll go back to the yellow box, I want an exit hole on long range deer.
RR