- Dec 10, 2010
How can neck sizing and the rear of the case pushing on the bolt face prevent galling the lugs? And how much rearward force does just the ejector apply to the bolt lugs. And why do the vast majority of competitive shooters tell you to full length resize with .001 to .002 shoulder bump?I guess I am lucky because I have never had a bolt lug gall. I have seen lugs that were very bad that needed to be leveled and squared to prevent this. when I blueprint an action after leveling and squaring, I polish both surfaces with 1200 or 1500 Garnet lapping compound. This makes the lugs very smooth and prevents galling.
Neck sizing can help prevent this but high pressure loads and heavy bolt lift are the biggest reason that galling occurs.
J E CUSTOM
I will take the word of someone who worked in the Sierra Bullets Ballistic Test Lab and who now shoots for Team Lapua USA.
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