What would be the results of having a short bearing surface on one bullet versus another? In this case, 7mm Rem Mag with Berger 140 gr VLD (bearing surface of only .122") versus Nosler 140 gr Accubond (don't know what the bearing surface is, but HAS to be a bit more than the Berger). Unless there is a typo on the Berger Tech Data list, that seems to be a really short bearing surface.
0.122 inch would be a very short bearing surface for a 7mm bullet. But Berger doesn't make a 140 grain 7mm VLD, at least their website doesn't show one. I believe they only make 168 and 180 grain 7mm VLDs and those certainly have longer bearing surfaces. Berger does make a 6.5 mm 140 VLD but it has a longer bearing surface too.
I'd suggest you check your source again. Sometimes browsers can scramble pdf files. As to what a short bearing surface could do, it would be to possibly allow the bullet to tip in the bore causing large yaw exiting the muzzle and poor accuracy. The bullet might still stabilize at some distance but muzzle yaw introduces an initial angular offset. That doesn't sound like any Berger bullets I've shot which includes most (all?) of their .264, 284, and .308s.
