My match rifle gets about 30-40 minutes, in front of a good TV show.
I lock the rifle onto the cleaning stand, pop the rear pin, tilt the recievers, pop in bore guide (way, way useful tool BTW), run copper solvent down bore. If I'm ambitious, I plug away on the bore for a few patches until they come out ungreen. If lacking will power, I clean bolt while solvent soaks barrel. Patch barrel, swab chamber, wipe gorp off of reciever internals, lube and done.
I break it down more thoroughly every couple of hundred rounds, when I feel an overwhelming need. Otherwise, the above is enough to, and doesn't over-do it so it returns to zero quickly on the next outing.