[Laufer]

Thanks robocop10mm.

I will begin checking primers.

[JonM]

one thing i would add. flat primer alone is not neccessarily a pressure sign. i generally look for 2 or more different signs. ive got a few calibers that flatten primers right out with minimum loadings

[JTJ]

It also appears that there is a crack in the neck.

[Joshua M. Smith]

Hello,

No cracked neck. That's where soot gathered.

All my Remington cases were backing out the primers, after I tried more loads. Went to Winchester and that stopped.

I'm looking for a 0.318" sizing die now. I've been told by those who know that a 0.323" jacketed will swage down just fine to 0.318" with a Lee sizing die. Was hoping to find one without custom prices, but I'll order one from Lee if necessary.

Thanks!

Josh