When at the range for a shooting session I use a solution of 2 parts olive oil, two parts water and one part alcohol as a patch lube. This has proven to be a great patch lube and it cleans as I reload. Now when I let my rifle stand for a few minutes between relays I usually run a spit patch down the bore, turn it over and run it down again because the fowling in the barrel will begin to harden. As long as I continue shooting and loading it is not necessary to clean between shots.