I wouldn't worry about it, I do it all the time. My 22 auto's get Tetra gun grease in the actions. If you ever get a chance to try it, give it a go. This grease actually works best when you rub it in then wipe it off. It leaves a residue that not only works great but without an oily film the action doesn't gum up with unburnt powder.

http://www.tetraproducts.com/product_view.asp?ID=1