I am reading an old reloading book by (1949) by Phillip Sharps. Complete Guide To Handloading.
He goes into detail about head spacing and if I read it correctly, he craters my thoughts of what I always thought excessive pressure signs in my primers really is. Flattened primers or primers that are pushed out a little from the case he attributes to bad head spacing.
I know that the book is old, but the physics are the same.
What is everyone's thoughts on what is really happening when our primers are flat? (I haven't had this happen since my college days when I tried to make my 30.06 a 30.06 magnum).
How do YOU know when you have excessive pressure signs?
I was a bit worried about running 73.5 grains of RL19, 225 grain Barnes TTSX, WLRM primers, OAL= 3.3375 in my .338wm ...but it shoots fine and I can't see any excessive pressure signs. When you pull the trigger it "feels" like a heavy load. I started at 69 and worked up 5 round tests at .5 gr steps. The 73.5 had the best grouping, I didn't have my chrono with me at the time. The Griz I shot in the sternum at 70 yards did not argue either.