I'm in the 6-10 category just in the handguns, never really thought about long guns. Nowadays I'm really starting to see the benefits of just a few calibers with prices being what they are.
Dupe? I'm clearly into dupes as I have several guns in each of several calibers. As for the thread being a dupe. Trying to care..................... No! Can't do it. Don't care.
It very may well be a "dupe", but maybe some of the newer members, like me, have never seen the original post/thread/message. So for me, it was a new thread.
That said, I have only four:
.22lr, for my Armscor M1600
.380, for my Bersa 97 and Thunder Duo-Tone
.30-30, for my Marlin 336W
.308, for my M-1A
Oh, I also have .177 for my Crosman M4-177 pellet rifle.