It's too much information to establish a pattern. If I start blogging about reloading, I could blog daily on the topic for the rest of my life and never run out of information to share. And as Donald Rumsfeld once said, "There are things we don't know we don't know."
A Borepatch related example. I'm fairly serious about reloading, so Borepatch makes a road trip up to see me. He's never reloaded. Brings his Enfield in .303 British, dies, powder, and bullets. Seemed straightforward enough.
We read the manual. We size the once-fired brass, check it every way I know, pick a moderate starting load from the Lyman manual, and made us some ammo. It's what you don't know, and more importantly, what you don't know you don't know that gets you. Because the information we needed was readily available on teh googles, we just didn't know what to search for.
Back in the day, the British were concerned about dirty rifles and the problems that might cause with chambering, so concerned that they made the chambers on the Enfields very large. If you're only going to fire brass once and leave it on the battlefield, who cares? But if you fire brass in an Enfield, then full length resize it to the specs in the manual, and fire it again, it has been stretched twice. And sometimes twice is enough.
I'd never had a head separation. Never. Thousands of reloads, mostly in .223 and 30.06, and while I would check my brass and look for signs of case failures, this just had not been an issue. Well, it's an issue with .303 British. We had a head separation. Left the body of the case in the chamber and ended our shooting for the day. It came out easy enough when we got home, and it caused no problems with the rifle, but it bothered me.
So, a quick search for .303 British head separation and lookie there. But we had to have the problem to know to make the search. Next time we will neck size, ensure it chambers in his rifle, and never full length size the .303 brass again.
There's lots of things I don't know. They exist as blind spots for Murphy to hide in.