there was an excellent article on cold bore shooting a few months ago in Shooting times, i think. Author used about 10 diff rifles, bolt, semi, lever etc. and tried several diff things there is cold bore, cold bore for about 30 mns or more, cold bore for a week; there is cold bore not cleaned, cold bore, cleaned, cold bore cleaned and left for a week , cold bore not cleaned , left for a week.
to put it shortly , the best results , with poi , poa, shift, etc., occured with a cold bore, cleaned, left alone for a day or more. two of his test rifles, a savage varminter, and a ar type in 243, hit predictably / exactly the same place, each time he cold bore, shot, cleaned, and left for over a day. he tried some after an hour, but apparently , there is still something deep in the molecules going on , in all the metal parts, in a rifle, that we just can't see, becuase the shots after an hour, though close, were not the same as the ones left cleaned for over a day.
also a winny 94 gave him some real good results, and a boltie 7mag from Weatheby or howa did real well. The worst was a Ruger, and another rifle, whose shots, no matter when shot were total shotgun, completely unpredictable, any time you shot it.