I rarely brush any of my barrels. Or my teeth. Seriously though, I don't like the idea of wearing out a barrel by overcleaning it. As for cleaning the BH209 after every trip, I am trying to get a handle on that myself. First of all, Western Powders claims that it is non-hydroscopic and noncorrosive. However, on the bottle, they recommend you run at least one wet patch down the bore after shooting just in case there was any moisture in barrel before you started shooting (i.e. the powder could trap the moisture underneath it once fired and turned to carbon...I'm assuming you would call the burnt BH209 carbon).

So, I'm in this situation as described within the range report I posted last night, where I finally got my POA and POI to match at 100 yards (after going through about 25-30 shots with no swabbing). There was no humidity when I shot and the bore was wiped down with a CLP before shooting. My groups seemed to shrink considerably the more I shot...i.e. the dirtier my barrel got, the better. Now that I'm finally zeroed, I'm very hesitant to clean my barrel because the next shot I take won't be at the range, it will be in the field (hopefully with a monster in the crosshairs!) I'm worried that if I clean my barrel and my first shot is 75 yards or more, that I my POI may not be acceptable as far as a clean kill is concerned.

On the other hand, I do not want my bore to rust, pit, etc...