Ed, since about late 1972, I've not had to swab or wipe the bore while shooting THAT day, even is shooting all day - 40, 50, or 100 shots - no fouling buildup, so I do not really
understand why someone would have to wipe their bore - due to fouling buildup. Now, if you were in a match where there was only one shot fired every 15 or 20 minutes, I could
see wiping the bore to maintain an even bore condition, but not if shooting every couple of minutes as we do on a tail walk. When hunting small game, I follow the same sequence.
I load before heading out, then after a shot, I reload - then after shooting again, I reload. That reload cleans the bore from the previous shot. Never have a buildup.
If in chunk or plank match as shot in the States where there was a boringly long period of time between shots, I would likely wipe with a damp cloth, then dry one before reloading - due to the
previous shot's fouling would have dried, changing the bore condition. With a wet patch (as we commonly use) on the ball, it would still load quite easily, though the accuracy might suffer - would have to test that to be sure.