What you use for swabbing between shots at the range is usually sufficient for removing storing oils when you first arrive. T/C 13, rubbing alcohol, Windex, windshield washer fluid.... etc ...all work well.

Get yourself a fewsmall spray bottles ($1 car scent bottle at auto parts or dollar store). I do a 50-50 mix of alcohol and Windex.I prefer that over burning blackpowder solvents like T/C 13in my bore.... especially if a face wind is occuring that day. Smelling/breathing/inhaling powder is bad enough... some harsh, burnt, airbornegun solvent residuecould produce sickness. So I prefer to use the weakest cleaner (outside of water) that I'm pleased with.

I remove the gun oils, then shoot one primer with a jag & ramrod down the bore. Even though I personally never store my MLs with the breechplug in the barrel, this sudden burst of "contained" heat/fire will remove any oils in the breechplug for those ML shooters that do store their breechplug in the barrel. Your plugmay accumulate drippingoil over weeks/months of inactivity if you store your ML "muzzle up".

I then remove the ramrod/jag and fire two more 209 primers - but do not swab the bore. I load my first target shot - fire - then swab with my 50-50 mix.

Everyone arriving at the range or woods has a slightly different approach to what they use & how they use it. The main idea is to avoid mis/hangfires & try to get your 2nd-3rd-4th shots as close to the bullseye as your 1st shot. For me, leaving three Federal 209A primers residue still intact in the borecreates enough artificial fouling so I instantly begin hunting with my 1st loaded shot.

Just keep in mind that what works for me may not work for you.