Originally Posted by SSGCharlie
Thanks for all the info. this is a great forum
I started reloading not all that long ago and I remember not knowing what specs were important for me and which weren't. With little or no experience, I was reluctant to violate any of the specs.
As it turns out the published COAL numbers have to do with meeting an industry standard so that the cartridge will fit into most any magazine and feed properly in most any rifle.
So, if you're loading for an AR, you need to stick pretty close to those specifications.
I shoot a .223 bolt gun and chamber one round at a time. So, in an attempt to squeeze every bit of accuracy out of every aspect of hand loading, I seat my bullets close to the rifling. That means my rounds are seated MUCH longer than yours and they don't come close to meeting the standard COAL specs. They won't fit in any magazine. In fact, I can't remember the last time I measured COAL. I use CBTO (cartridge base to ogive) as a better measure of length, for my purposes anyway.
Bottom line: You're doing the right thing in asking about reloading. This hobby is filled with mysteries and it also has the potential to be dangerous if you don't follow certain rules. And it's not always intuitive when you're trying to find out about the rules. Learning about those rules, and learning about the relative importance of guidelines, is important. Keep asking questions.