Hello all,
I'm new to reloading but have been browsing this site over the past 6 months collecting little bits of information here and there. I'm just getting into the first few test loads in 9mm and have a couple questions, hopefully this is the right place. My first test was just 10 rounds loaded with a 115 grain FMJ made by Browning and 4.2 grains of Bullseye. The manual i'm reading from specifies this should work out to 1050 fps out of a 4" barrel. The problem is, shooting out of my Walther PPQ, 2-3 of them had issues cycling the action, locking the slide back, etc. All indicating too light of a load. The only thing I can think of that I may have done wrong is the COL. The book calls for 1.100" COL and I loaded them to 1.162", which is what I measured on the factory rounds that those bullets were pulled from. Would that difference in COL have any significant change in pressure/velocity? I'm hesitant to start increasing the powder charge until I have access to a chronograph