300 wsm should shoot them fine. You need to do a seating depth test it takes 24 rounds.
Step one take resized unprimed case cut slit in neck with dremmel tool insert 210 VLD start into neck just a bit. Now take dummy round and insert into rifle close bolt. open bolt extract round you now have a dummy round for your rifle and 210g VLD with the COAL.
Take mesurament of round for COAL. Now you need to load 24 rounds of ammo.
1st 6 rounds are .010 off the lands
2nd 6 are .030 off the lands
3rd 6 are .050 off the lands
4th 6 are .130 off the lands
Shoot four six round groups at 200 yards. You may need to use some factory ammo to get your group close on the paper before you shoot for groups. The result will be one group is much much tighter than the other four and this is your VLD starting point it will save you ammo in the load development process