Forster - Gunsmith Screwdrivers Dry Neck Lube This leads to case neck

This leads to case neck concentricity and bullet run-out issues

NOT case head

This only means the round DOES NOT meet SAAMI Min Chamber dimensions and is telling you to take another look before deciding that your round is good to fire

irregularities and burrs at the mouth of the case

Forster - Gunsmith Screwdrivers Dry Neck Lube This leads to case neckNo. 6 (#001101) Description: Forster Gunsmith Screwdriver #6, 3 8" Wide x 0. 065" Thick Blade w 12" Shank For Buttstock Screws. These U. S. made, hollow ground 12" gunsmith screwdrivers are versatile enough to be adaptable to many other uses, as well. All Forster screwdrivers are manufactured using the highest quality hardened steel. NO. USE DIMENSION A DIMENSION B DIMENSION C DIMENSION D 6 Special for butt stock screws 3 8" 12" 0. 065" 0. 062"