Well, I find a 4 inch blade and a garden hose works great as a boar cleaner. You might try one of those power-washers if the blood is really dry.
(An old Lt Col friend of mine claims gun cleaning is a ruse to keep the troops busy so they don't run off and get VD from the local professional ladies (or any reasonable facsimile). The secondary purpose is to get the larger pieces of CS and BS and plain old mud out of the barrel so you don't kill yourself instead of someone who might deserve it upon exercising your index finger.) :-)
