Yes, on the Peninsula
When you say the spent primers have a lip on them. Like around the firing pin indentation...??? That is generally referred to as cratering. Typically caused by excess pressure.
Imagine sweeping your finger into some peanut butter, as you pull it out you will leave a ridge, that what I have. Its not all around, just one little portion. And its not every round but most of them. The rest of the primer is smooth but not flattened as if it was over pressured.
Over the years I've shot tens of thousands of rounds from many calibers and this is the only time I've seen this. I'll try to put some pics up
