I think you didn't understand.
When I created them, many players got interested in using them; but after knowing my guns are balanced against "normal" weapons (bows, crossbows, swords...), nearly all of them gave up and used bows or swords or whatever.
I actually tried to make them more different, making changes on pistols, rifles, shotguns. It was at the beginning of my RPG experience, but the strongest feedback I got was "if it's not broken, I'm not going to use it". Some players, after many gaming days, got interested in pistols because I designed them to be better-wielded by Rogues. Still, it was just before that campaign ended T_T
Part of the blame is on the system: playing with few splatbooks, there were not a lot of ranged weapon classes.
I still make guns available in my games, with balance being a prime goal. I just try to make them more different from pre-existing weapons, making them feel "special". Guns are a big part on my setting so I need them. However, that experience was from quite some time ago: I don't DM for a long while, so I think reception should be different now.