I am developing a load for 9mm using the 124gr Hornaday XTP bullet and WW SPP, following the VV loading table on their web site. It does not have that specific bullet, but it does list a Hornaday 124gr FMJ load of 5.3-5.7gr. Dropping back a bit, I am trying 5.5gr, and the primer is trying to tell me something that I don't know how to interpret.
The primer has a raised burr at the ends, something I've never seen before. I pulled the firing pin and checked it. Its completely smooth and normal.
Is this a excessive pressure sign?
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