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Headspace, resizing brass

jackinfl

Sergeant
Full Member
Minuteman
Dec 19, 2008
836
163
Fort lauderdale, Fl
I am reloading 6mm Creedmoor. Full length sizing. I have read shoulder bump from fired brass should be .003-.004 However, I am also told that .004 is in the range of a no-go gauge.
Questions: What is the optimal shoulder bump to maximize accuracy and RELIABILITY in a field environment?
Also, can a "sloppy", say bumped .005-.006 piece of sized brass effect accuracy?

I want to say thanks in advance, there is so much knowledge within our members. It's nice to be able to ask questions and get straight answers.
 
.002-003 is the typical standard. My dasher brass is bumped .003 +/- .0005
 
.002-003 is the typical standard. My dasher brass is bumped .003 +/- .0005
Some go .001-.002 but I agree that .004 is a bit much and not needed. You are just over working the brass at that point
 
I go for .001-.002 in bolt guns.
.004 is ok but is kinda over working brass.
In a hunting only rifle I’d be totally happy with .004.
 
I've been doing 0.002 on my 6.5cm, and 0.003 on my AR (.223). So far so good