CCI BR PRIMERS ---- MISFIRING...

[BigKev]

The most ''blanks'' I've ever had were the BR-4's

Egan,

If you don't mind me asking did you switch to another primer or just deal with an occasional misfire ?? Are you headed to the club this Saturday ??

 

[GrocMax]

Seems reading comprehension is at an all-time low.............

 

[Webster]

I went down this road recently with misfires and CCI BR4/CCI 450's. There's a lengthy and informative thread on it here:

http://forum.accurateshooter.com/th...l-it-with-custom-action-6-5x47-lapua.3920867/

I solved my issue by replacing the firing pin spring and lapping/polishing the back of my firing pin where it was dragging in the bolt shroud. The firing pin spring that came with it was either a light spring or well worn.

Where you're experiencing this with fire-forming loads, it seems more likely that it's a headspace issue. That said, there's probably more than one thing contributing... Like the harder cup on the CCI BR primers, plus headspace on fire-forming loads, plus primer seating depth, plus maybe something else.

In Tony Boyers book he shows how he uses a drill and enlarges half the length of the firing pin shroud to reduce drag. Beware of making burrs.

 

[JEFFPPC]

Egan,

If you don't mind me asking did you switch to another primer or just deal with an occasional misfire ?? Are you headed to the club this Saturday ??

I had this exact problem 2 yrs. ago with BR4 primers . I would get a light hit on the primer but no BANG. The answer was my Lee primer tool was so worn it was not seating the primers against the bottom of the primer pocket. The loss of energy from the firing pin fully seating the primer kept the anvil from crushing thus not igniting the primer. A new priming tool ended my problem.