flat primer question

[Scott Evans]

For the .040" +/- .005" pin protrusion to work reliably several stars need to be aligned-

Case to chamber fit (both headspace and body diameter) must be close.
No Tula or Wolf SR primers (they seem to be very low sensitivity, require a strong deep strike)
Not fireforming AI type brass.

Any of the above can lead to a marked increased in FTF's.

[WV1951]

Scott, I did that very thing last night and took my protrusion down about .003. I am now at .045 protrusion, which is a bit more than the .035 recommendation, but might help some. Should know tomorrow, if I go out.

Shoot some groups and the primer dent looked better and the 69's, which are the offenders, left very little cratering. Just a slight rough edge. I am ok with where I am, and since I will be staying far from max loads, I think I am good to go.