Max Seating Depth Variations in barrels

[alwie]

Which barrels are we talking about?
I have/had 4 barrels from different mfrs:
monster, faxon, uintah, ballistic adv, and the most variation for a given bullet has been 0.010-0.020 in chamber size to lands, and that much only on 1 or 2 bullets.  Only a sample of four barrels, though.

I have 2 Shaw Custom barrels and one McGowen Precision barrel.  The McGowen barrel seems to have a much shorter seating depth. The two Shaw barrels are exactly the same. I am using a Hornady seating depth gauge.