Do NOT want to start a firefight! Can someone explain what causes some petroleum products to be inappropriate for muzzleloaders and others (paraffin based?) to be OK. Thanks
What causes some petroleum product to
appear to be inappropriate for muzzle loaders is choosing the wrong type of cleaner to remove the observed tar.
The popular detergent and water which is great for carbon fouling but it is so slow at dissolving tar that it appears ineffective.
If a powerful solvent known to dissolve tar was used the general opinion on using petroleum base products would be a lot different.
Some greases are water insoluble and require a good detergent or solvent to remove them.
Choose the right solvent for the mess you trying to clean up and the whole cleaning process will go much easier and faster.
I always finish my bore cleaning with some Hoppe's #9 because it so readily available and cheap.
If brown or black show up on the white patch I keep cleaning with the Hoppe's till the brown is gone, then change solvents.
Then apply the final anti rust proofing gun oil when satisfied the bore is clean.
Remember to dry out the anti rust gun oil prior to shooting.
Use a double application of a modern smokeless powder solvent, when the patches come out clean after using the first solvent you might think the barrels is clean & jobs done. But now change to the second smokeless solvent and watch the patch come out black again.
Its the change in solvent that improves the depth of cleaning (carbon and tar) and it does not matter which smokeless solvent brand you start with, its the change to a different brands solvent chemistry the seem to reactivate residual fouling to appear on the patches again.
So begin barrel cleaning after shooting BP with the usual water and Dawn detergent, then finish with a nitro powder solvent as
test to detect if tar is present and to dissolve the tar if present. When the barrel seems clean switch nitro solvents.