I've used primarily CCI and Win (mostly CCI) since i started loading in '87.
I've had 2 misfires that were not a mechanical problem, both wer media in the flashhole.
You mentioned 2 factory misfires on your 30-06, check the length of the firing pin, make sure the tip has not een broken off, and check the firing spring for proper tension, if it isn't hitting hard enough it can dent without firing.
won't hurt to check your others for that either.
definate ID of the fluid leakage would help.
Good idea on the hand primer, they just need to be snug and seated well, doesn't need a beargrip, if seated too deep your firing pin can't hit it properly, again denting without firing.
One last thing, be careful using magnum primers with loadings listed in the manuals, unless the manual specifically states it was developed using a magnum primer. using a different type primer _will_ change the pressure curve on the load.
Not saying don't do it, just be careful, drop down and work backup, same as if you changed any other component.
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