Grease for o/u's

[fabsroman]

I have been using Beretta's oil on my o/u's just because I have so much of it from the new guns that I have purchased. However, when I shoot a lot it just doesn't do the trick. I would like to use something like grease, but I have no idea what to get. I have some gun grease by Hoppes, but I think that stuff is just for storing the gun. I do use it on my choke tubes though.

Any suggestions would be appreciated along with where to get the stuff. I know a lot of guys use special stuff (e.g., 6.5's4ever), and I need to know where to get it if I am going to use it.