I shot some 44 mag 7.5g trail boss loads out of my rifle today. First 5 loads averaged 963 fps. The next two were 563 and 562fps. I hand measured the powder charge so it wasn't off. One of my primers didn't ignite and a had a few in the same box not ignite earlier in the week. Could my issue be faulty primers, crushed powder, or a weak crimp?
Who makes the most reliable primers? It's been a long, long time since I had one that wouldn't ignite. My firing pin put a huge crater in my primer so I know the pin and spring is good. The ones I'm having trouble with are federal magnum large pistol primers.