Originally Posted by
Texas Solo
I pay no attention to the book COAL as it measures at the bullet tip, not the ogive.
Measure your chamber as you described, then minus .005". That .005" jump is a popular starting point and will keep you from approaching high pressure from jamming the bullet.
You will need new measurements for each different bullet you try as each different bullet has a different profile. I get a .020" difference between my 155's and my 168's.
I never crimp my rifle ammo. .002" neck tension is sufficient.
Stay with the same seating depth, whatever that is, during your load development for powder charge. You can play with different depths after finding your optimal powder charge.
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