Came across this interesting little piece
http://vitals.nbcnews.com/_news/2013/01/16/16532333-obama-plan-eases-freeze-on-cdc-gun-violence-researchIt tells a bit about gun research done and partly also why there haven't been any broad studies into the whole range of gun ownership and violence. The two main points that I think are crucial in this article are these two things.
1) Research showed that homes with guns had three times greater risks of homocide and five times the risks of suicide. In other words, yes, you might feel a bit safer from intruders, but you're still more likely to have a homocide occur in your house thanks to the 9mm under your bed.
Of course, I don't think this study is at all conclusive on whether or nut guns create more suicides or anything like that, BUT the results from this study really do cry out for more research to be done on the matter.
2) The NRA and their buddie's way of censoring research that might not go their way. One thing is if they go out and say that this research might not be good or actually use civilised methods, but using their channels to choke funding, slander the scientists that wanted to do the research and in some cases even threatening their families. I hear the extremists call out that by gun control will be a first step towards a dictatorish government, but the way I see it you already have several organisations causing a communist/nazi like censorship of anything they don't agree with and might hurt their cause.