The cartridge and bullet weight make a very large difference, if you want a numerical answer in thousandths of an inch.
You cannot use COAL with Berger VLD bullets for several reasons.
They are not consistent length, batch to batch.
You cannot use a seating die setting which works for other bullets, like Sierra GK or MK, because they are secant ogive and the VLD is not.
The Hornady Comparator will give some indication off the curvature, but it is made for secant ogive bullets, which VLDs are not.
Sinclair makes a steel comparator for the VLD, which closely simulates the throat and rifling.
Redding makes a special seating die for the VLD. So does Sinclair and Wilson.
I don't shoot Berger bullets, because I have all the accuracy and performance I need out of the other bullets I have. That said, and all I stated above, the place I would start with them is with a seating die that worked for a very accurate load in a very accurate rifle, using the same powder load and primer, seat them with that same die, and see what COAL that gave, and if it will fit into the magazine. Then I would shoot them and see if they were as accurate as the other bullet. I would push one into the rifling in an empty case, and compare that COAL with the loaded one, to tell me whether to adjust the fired load out further or seat it back, for my next batch.