What velocity could I expect with loading noslers 200gr accubond in my M70 classic?
I'm hoping that I can end up with a "one load" does all situation from small game to large.
From what I can seen on the forums it looks like I should be able to get a 200gr bullet doing what a factory 180gr load would do normally with a whole heap more energy delivered on target.

Expect 2900 fps. If you happen to have a "fast" barrel, you might squeeze out nearly 3000 fps without excessive pressure. Rifles will vary, but with a 24" barrel, you should end up somewhere between these two figures. Try IMR 7828 or RL-25.

I developed a load last fall for 200 gr Partitions in a Win classic with a 24" factory barrel in 300 Win Mag. Using Fed 215 mag primers and 82.5 to 83.0 grains of Retumbo, I got an average of 2990 fps. Range was about 2975 to 3015 and I got better velocity at this load range than the max listed of 84.0 grains from Hodgdon. Accuracy was under MOA out to 400 yards. Hope this helps.