My usual practice is to run a few wet patches down the barrel at the range when I'm done shooting for the day. I then run a couple of patches with WD -40. Normally I clean the gun when I get home. But once in a great while something comes up and the gun doesn't get cleaned until the next day. I've never had problems with a barrel that has waited over night to be cleaned.
Now to the other extreme, I have purchased guns from pawn shops that look like they have been shot plenty and never cleaned or cleaned wrong. Down goes the bore light and down goes the price. It always takes lots of work but I have only had one that I couldn't get to shoot better than I can hold. Actually, the one that still has problems hasn't been shot since I got it. I already had a barrel I wanted to use on the stock and I didn't go the extra mile to fix the original barrel. The barrel is now clean and lubed but it has some pitting, my guess is that it will shoot reasonably well.
My experience tells me that bores often look more damaged than they really are. Light cleaning at the range and topped off with WD-40 should buy you a few days before serious damage is done. I just like my guns too much to neglect them if at all possible.
Now to the other extreme, I have purchased guns from pawn shops that look like they have been shot plenty and never cleaned or cleaned wrong. Down goes the bore light and down goes the price. It always takes lots of work but I have only had one that I couldn't get to shoot better than I can hold. Actually, the one that still has problems hasn't been shot since I got it. I already had a barrel I wanted to use on the stock and I didn't go the extra mile to fix the original barrel. The barrel is now clean and lubed but it has some pitting, my guess is that it will shoot reasonably well.
My experience tells me that bores often look more damaged than they really are. Light cleaning at the range and topped off with WD-40 should buy you a few days before serious damage is done. I just like my guns too much to neglect them if at all possible.