Quote:
Originally Posted by Unclenick
That variation was possibly due to the distances from your case shoulders to your bullet ogive, the thing that controls how far the bullet sticks into the throat when a case headspaces on the chamber shoulder, was not perfectly uniform.
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Thanks for explaining the reality of what controls bullet position relative to the throat when the round is fired. Case heads are typically not touching bolt faces when fired.
I will add the fact that the throat contact point diameter is typically a few thousandths less than bullet diameter. If your gauge used to measure bullet ogive to some place on the case has a touch point diameter smaller than the barrel's bore diameter, it's too small and very misleading because that point never touches the rifling.