You need to condition the bore the same between shots and it needs to be the same when you fire that first shot when hunting...
For years, this is what I have done...Dampen 2-3 patches with rubbing alcohol, run down the bore, both sides...Then run a dry patch down, run a lightly oiled patch down the bore and then a dry one.
Some guns need 2, some need 3 with the alcohol to remove most of the fouling, also make sure that the patches are not wet, but damp, wring out the excess moisture or you will contaminate the powder residue in the breech plug.