500 S&W Magnum Pressure Signs

[DadSmith]

Thanks to all who replied. For what it’s worth, the cases eject very easily with no sticking at all. I didn’t think to mention that before but someone else brought it up and it reminded me. That puzzles me.

My chrono should arrive today. I’ll check my measurements and then fire a few more and hopefully get some data there. I’ll also post some pictures of my spent cases. Maybe you guys could weigh in and let me know if these primers are actually flattening or if they look normal to you.

If the bottom looks flat all the way across with just the firing pen indentation you have flattened primers. If you still have separation between the primer and case you don't. You can also see them start flattening out as well. That's when I usually back off and drop back to a safer load. Some guns you can't even get close to maximum powder charge and some you can go over. Maybe a professional can explain why that is.