Those puffs of oil/solvent coming out of a cleaned and oiled rifle sure showed up at high power matches as the 1st fouling/sighting shots were fired of the day. All up and down the firing line, little puffs of smoke. Yep that would be bad for any sniper military or police.Guess the USMC experts have a different opinion?
I'll attempt a easier to follow photo?
And a helpful page for what Old Folks used to annotate to track the Clean Cold Bore .