If you really are getting 'sludgey' smokey dirty weapons using cast bullets, there are many fixes. Less lube, different lube, different powders, different firearms lubricants. My 1911's are no dirtier shooting 155 and 200 grain lead SWC than my 9mm's shooting factory jacketed. Same number of rounds. I shoot maybe 50 rounds a week through about 5 different handguns and another hundred through various rifles 70-30 cast to jacketed on handguns, 50-50 on rifles. No smoke or sludge to speak of. Clean when accuracy falls of or I feel the action slow or the Wyoming wind is blowing dirt over everything. I do clean the pistol/revolver before using as a carry gun, hunting rifles get a detail strip and clean before season, barrels are left fouled.