This blow tube thing has me perplexed.
That's all fine n dandy for my big bull barrelled roller and I will mop it too, I suppose.
But I have my big 1876 repro lever gun running on the holy black too - the guys aren't blowing those guns too, are they? How many rounds can you go before your gun bungs up from the fouling? I know my .54 muzzle loader turned into a bear after about five shots with light charges and as little as two or three with really heavy charges of powder...