I do not know what powder you are shooting but It doesn't make any difference, for black powder subs besides BH 209 use the appropriate solvent and lube. For BH 209 use solvent and lubes like Slip 2000 gun lube and hope's elite gun cleaner.
What you do on the range is use 1 solvent patch and patch the bore both sides, then dry patch the bore and save the patch. Then take a lubed patch to the bore, Then the patch you saved turn it over and dry patch the bore, save this patch and use it for your solvent patch after your next shot.
Load and shoot, do this between every shot. When you get home clean your gun with the same chemicals you used on the range, lube the gun and put it up. The next time you get your gun out to go to the range put one dry patch down the barrel. At the range you will not see any fliers on the first shot. Your groups should be smaller also.

Without going into it a lot, FORGET the bore butter!

Use solvents and lubes that will not conflict with black powder subs. Slip 2000 gun lube will not react with black powder fouling or modern powder fouling.