I have a Marlin 336 (lever action .35), and a Rem 710 (bolt action '06), and the big thing that I've learned from man-ops is that they don't really need to be clean to shoot a cycle effectively. Now, it's not very good for the metal componants to leave grit and grime and what-not to abrase the metal surfaces. When I do clean it (after every range trip), it usually doesn't take me very long, everything on the 336 basically just "drops out" the bottom (except for about 3-4 components), and go back together quite easily. The 710 is even easier to clean, remove the bolt, run compressed air on the internals, and shove a rod down the barrel. 5 minutes, tops.