Well, I found my problem......... and it was MY PROBLEM!!
stoopidhead me...
I got four more fails to fire today using Federal primers.
Took everything apart and found something, they weren't really misfires, they were NO FIRES of the primers! Here's the deal......
I was fireforming after neckturning.
I was using a very sticky STP-like oil called "Pro Blend Assembly Lube" for neckturning lube.
I wasn't cleaning it out well enough...
... I'm lazy and wanted to just fire them clean, which WORKS for the most part. Using die wax or LPS for lube I've fired hunnerds this way........ wipe 'em out a liddle and blow the gunk down the barrel.
ANYway..... Every disassembled round had sticky junk, small clumps of powder down in the bottom.
I put THE SAME POWDER back in and new primers and BANG!! Each and EVERY one. I even shot them over the chronograph and they clocked close to normal. Not more than 50fps down. I took some pictures of the unfired primers, two of them were wet with oil. One even squished out the primer material when the anvil came down.
Soooo, the problem was ME! I was so convinced from prior experimentation that primers were basically bulletproof that I got sloppy. I just had reached in with a Q-tip and ironed the bulk oil out and let 'er buck (or not
)
Well I got news for ya Al, ASSEMBLY LUBE KILLS PRIMERS!
So, I cleaned 'em up, used LPS for my final turning, the cleanup-thou, and fired away merrily all day. Used up old primers that were laying in my possibles boxes, mixed and matched and had ZERO hangs/misses of any sort. Only thing I found was that Rem 7 1/2's MAY make 30-50fps more velocity with this load of H4350.
Problem solved.
New cases are beayoootiful
And even with having to disassemble a dozen rounds it was quicker than boiling them out or washing with CLR I guess.
thanxall
al
