Coincidentally I have been working up that exact load.
Tikka t3 270 WSM
140 gr Berger vld
Hornady brass
cci magnum large rifle primers
H4831sc
So, for my rifle I have the coal at .010 off the lands. This will be something that you determine as a best fit for your rig. Fit for your rifle will be different.
Walt Berger gives the powder load from 58.5 grains to 65 max for h4831sc
I have narrowed by best load to be somewhere between 62-63 grains. It looks promising at 62.7 grains. 3100 fps.
This is a best fit for my rifle. What works in yours will depend.
Good luck friend.