Re: Sticky Bolt after 3rd-4th shot on brass
Couple questions and couple facts.
1. How far are you bumping the shoulders back now on the brass sized 4x?
2. What is body size dimension change about .200 above extractor groove from virgin brass to 4x fired as compared to FL sized brass? KEY ISSUE here.
You can measure 3-4x with caliper to get an average, but blade micrometer is better.
1. Annealing has nothing to do with extraction, especially in your case. You anneal the case neck for uniformity of neck tension on seating bullets.
2. Bumping the shoulders back will not solve extraction issues UNLESS you are not doing it enough to have smooth chambering. If you have smooth chambering, then shoulder bump is not your issue.
Shoulder and case neck issues cause hard chambering, not extraction normally.
My bet is you have an issue between your chamber specs and the FL size die you are using. Your chamber might be on the outer end of SAAMI while and the size die is the same and you are not getting any/very much body sizing if any at all. Many times, this is where your hard extraction is coming from if not way overpressure. Normally, size dies tend to be on the small end of SAAMI, to allow enough sizing to chamber everything.
My bet is this is the issue, and you need another size die or Redding body die.
Redding body die ($27) would be what I would go with first. Your body dimension changes will tell you if that is the issue.
Last edited by BountyHunter; 12-02-2012 at 08:02 PM.