I've had a M700 ADL 6mm since 1973. It will shoot under MOA with these handloads:
46 gr. IMR4350 with Speer 75 gr. HP, Rem 9 1/2 primer, WW brass.
Same load with 70 gr. Sierra HPBT.
Same load with 70 gr. Nosler Ballistic Tip.
I used to shoot 47.5 gr. IMR4350 but found the 46 gr. load to be more accurate.
Next most accurate varmint load is:
50.0 gr. Reloader 19, 70 gr. Nosler BT or 75 gr. Hornady HP, WW brass and CCI or Rem primer.
Game load:
45.0 gr. H4831, 100 gr. Sierra spitzer, WW brass, Rem 9 1/2 primer.
I had a good game load using the Speer 90 gr. spitzer but can't find any written records on it at the moment. I remember it used IMR4895 which would seem like the wrong powder for the 6mm, but it worked well.
Good luck. It's a good caliber that is overlooked.
My experiences with it go back to spring, 1973 when I bought it new. I went to buy a .25-06 but they didn't have one so I bought the 6mm. I'm glad I did. I've used it on everything from prairie dogs to big whitetail deer. I used it extensively to hunt coyotes; I think 6mm (which includes the .243 Win) is the minimum caliber that is reliable on coyotes.
I killed my biggest deer with this gun with a 75 gr. HP, a bullet which I would never deliberately use on game. I was hunting coyotes and a 12 point buck made a mistake of presenting a shot and I didn't have any game loads on me. He was running and that 75 gr. HP took him down instantaneously but I still would not recommend using that bullet on game, given a choice.
If the range gets long enough, it will drive a 90 or 100 gr. game bullet completely through a deer. Up close, (under 200 yards) it won't do that, they usually stay inside.
The first time I went prairie dog hunting, the 6mm was all I had. I put about 150 rounds through it in a few hours. The barrel was almost smoking; you didn't dare touch it. Although the 6mm is a mild recoiling gun, that was enough that I had a bruised cheek and shoulder the next day. I was afraid I'd burned up the barrel, but it seemed to have no effect. It shoots as good now, if not better, than it did then.