Originally Posted by Bodywerks
your oal to the lands of your rifling will be the same for any bullet, be it a long nose vld bullet or a soft point hunting bullet
Maybe I'm misunderstanding what you mean't. But;
If you're talking about contact distance, you need to understand this isn't true.
It isn't even a constant for same bullets in lot.
Actual contact distance is affected by ogive radius and leade angle. In same lot of same bullets, there is ogive radius variance, and this can throw off all datums.
No doubt some of this is why different bullet types often need tweaking in seating to match another's performance. Or, another bullet may need major seating changes to get same, worse, or better performance. But seated contact distance is only one factor(a very important one).
This is why I suggest the only truth that matters is what the gun tells you.