Re: Bullet weight and bearing surface?
Here is a perspective that I think should be considered: You got it all backwards.
You really should be figuring out what you need first, and then measuring to find it. Or, measuring as part of YOUR determining what you need, and then measuring to find it.
Without detailed qualifications(of your measurements) we don't even know where the variances apply toward internal or external ballistics theoretically. And we can't fire those bullets for you, in your gun, across a known good chronograph, with a fully developed load, a good target scope & properly prepped brass.
So there is no way we could tell you what to do with your actions so far other than to test for results of it, or misguide you with our anecdotal hogwash.
For that, from me, I say you won't see a bit of difference that you can prove on target -until you do.