I don't think that our members are being anal-retentive when they make corrections about calling a magazine a magazine. Like most of us on this forum, we have a great passion for firearms. Some of us feel that the best way to help someone out is to offer our two-cents worth when something is stated incorrectly. When I was in the army, I was in for a rude awakening when I ONCE referred to my M-16A1 as a "gun."
The gun world is literally a world unto itself, with different forms of expression, terminology, and attitudes. Take the time to acquaint yourself with it and you'll find yourself noticing the "nits" that need to be picked.
Take the correction in the way that it was given, as a friendly discussion on the proper terminology as it applies to firearms. I don't think that anyone is trying to flame you.