G'Day Fella's,
I recently purchased a heap (x 3000ish) of once fired 9mm Luger/9 x 19mm cases.
When I got them back to the Funshop, I realised they were a mixed bunch of cases, not only different brands bur different batches (of Federal Cartridge/FC).
If you look at the primer flash holes, you can see that the left hand side two FC Non Toxic (NT) have large flash holes, the middle two FC NT have normal size flash holes, the same size as the two standard Toxic Winchester cases on the right!
From what I've read on this, because the primer Flash Hole is so much larger, it is recommended that you reduce your normal powder charge by some amount, to stop a large Pressure Spike from happening!
But then, I've spoken to some people, that have had no problems when using these cases.......................... but I don't know anything about what their normal powder charge is so???
Also, many of these NT cases, have their primers Crimped in place!
So to ease seating new primers, I De-Crimped them all.
Here is an image of Before and After.
Doh!
Homer