Where I live it is very hard to find black powder on a regular basis. Now I have a supply I can count on and would appreciate your opinion. I have a 40 cal target rifle that no matter how I very the load or patch, Goex 3f burns very dirty in my gun. I have an option to purchase different powders now but I have to drive 150 miles round trip to get it. Can anyone advise me on a cleaner powder to purchase? Trying to save a little money in travel and powder purchases
My .40 cal. Goodoien barrel had a .398" bore, with .010" rifling. I used a .395" mould which cast a .398" ball, and a 10 ounce denim patch, which I measure compressed at .0225". The gun also shot fine with that same ball and an 8 ounce denim patch, which I measure at .019" compressed. This bore had very wide grooves and narrow lands.
Even with the thicker patch, I can push the patched ball into the muzzle using only the stud on my starter and pressing it with my right hand- no hitting needed. The PURE lead ball (as pure as I can get) conforms in to the bore, perfectly. The crown's shape is VERY important and must be made smooth to reduce friction & allow the lead to move, conform into the bore - IF the barrel's best accuracy is desired.
This is the crown, on that muzzle.
I use mostly GOEX 3F but also developed target-loads with 2f GOEX for that rifle. When using a slippery oily patch lube, I needed 65gr. 3F and achieved 1/2", 5-shot groups at 50yards. I found that 75.0gr. 2f was required with the same slippery lube to get identical accuracy. I NEVER had any fouling buildup in the bore - never. Whether I shot a 20 shot trail, or went through close to 100shots in a day, the bore NEVER needed wiping or cleaning. I go to the range to shoot, I clean the bore after I get home.
My .45 cal barrel needed 75.0gr. 3f and 85.0gr. of 2F for the same accuracy. In it, I used a .445" ball and the same 10 ounce denim patch in it, as well, producing most groups with 4 our of 5 shots inside 1/2" at 50 yards. This GM barrel did not like the 8 ounce, .019" patch for some reason. It still shot cleanly with it, never needing wiping, but the accuracy was at to just over an inch at 50 yards off a rest, not the 1/2" as with the thicker patches. This rifle has a .450" bore and a similar crown. After using a tapered grinding stone with EMERY or wet/dry paper on it, I use the end of my thumb for finishing off the nicely rounded, smooth crown.
If the crown has sharp, machine tool cut edges, whether an angle tool was used or not, the crown will not allow you to seat a tight combination in it. A tight combination is needed for accuracy and clean shooting. If you use a tight load, with sufficient lubrication to soften the fouling, the fouling never gets to build up and only the fouling from the last shot is in the bore. That fouling is easily pushed down with the next wet lubed patch.