I think Joss was very anti-gun hence why you have Buffy making a comment "these things, never useful" and why Warren used a gun to kill Tara and shoot Buffy. To have the scoobies toting guns about would normalise carrying a gun and take away a little of the awfulness of Tara's death. As @thrasherpix points out, most guns aren't much use against demons or vampires and are more likely to escalate a situation than solve it. The rocket launcher against the Judge was only of use because it separated the Judges body parts and destroyed them so he couldn't be reassembled, a normal gun wouldn't have been much use.Should the scoobies have used more guns? Would that make it more or less realistic? If so, What kind of guns would they carry?
Don't forget Spike who planned to shoot Buffy but changed his mind.But they are against humans; I don't know why only Darla and Warren were the only ones to ever try to shoot Buffy.
Unfortunately, in the Buffyverse, unlike the Blade or Monster Hunter International universes. silver apparently doesn't effect a vampire, though I recall some werewolf hunter who used them coming to Sunnydale. I wouldn't have been surprised if the Initiative had some sort of specialized ammunition, though we never saw anything of the nature on the show, unless, possibly, in the episode where Angel comes back to Sunnydale and he and Riley have their little smackdown. At the end, Riley threatened Angel with his handgun, though he certainly would have known that regular ammunition wouldn't effect Angel. In order to be any sort of threat, it would have had to be loaded with some sort of special ammunition. Incendiary, perhaps? Fire will kill, or at least injure, most demons or vampires.In MHI, Hunters use hollow tip bullets filled with silver pellets designed to explode upon impact.
I doubt he needed special ammunition; standard, everyday hollow point bullets would do a ton of damage to him and Angel was kinda a wimp sometimes when it came to things like that.At the end, Riley threatened Angel with his handgun, though he certainly would have known that regular ammunition wouldn't effect Angel. In order to be any sort of threat, it would have had to be loaded with some sort of special ammunition.
It didn't occur to me at first that Riley wouldn't be actually counting on killing Angel with his gun. Possibly he was only hoping to injure Angel sufficiently to allow him time to improvise some sort of wooden stake, 15 rounds of 9 mm would certainly sting, and if he picked his target properly, might blind him, pretty much ending the fight then and there, since we've seen that vampires in the Buffyverse regenerate from massive wounds slowly, if at all. That's assuming that he managed to get off that many rounds before Buffy stopped him in a very painful way. Might have made for an interesting scene.standard, everyday hollow point bullets
More guns would have taken the fun out of things.
I don't know so much about "fun," but, under the right circumstances, guns can definitely make for good drama. Look at the first scene in the original "Blade" movie, when Snipes steps into the room full of vampires and starts shooting. And it's not just senseless slaughter, mowing down a bunch of cowering victims. He uses blades, some sort of edged boomerang and martial arts, It's an actual fight, in quarters close enough that the vampires are actually within striking distance. It's one man against dozens, and the outcome actually is in question.guns don't make for good drama.