If you have an accurate gun and appreciate that fact and want to keep it that way, then clean it after shooting it.
I don't mean a detail strip and clean either. I laugh at those who talk about doing such things after every shooting session.
Nor do I mean scrubbing a bore with a brush till your arm is tired. No, I am referring to a simple patch with powder solvent on it run down the bore followed by a couple dry patches and then a patch with some oil on it so it leaves the bore "wet" for storage. Just be sure to run a dry patch through it before shooting the next time to remove oil residue.
It is imperative that you remove all powder residue from the bore as it attracts moisture and this will lead to corrosion. Even non corrosive ammo leaves behind powder residue that will ultimately lead to corrosion in the bore if left in place.
I can show you a 22 rimfire pistol I own with a dark spot in the bore to prove this point, and no it was not me who was responsible for that. It came that way from the previous owner. Still shoots fairly well until that spot of pitting starts to strip too much lead from bullets and creates a big lead streak in the bore.
I also have one military rifle that I purchased with a "frosted" bore that shoots ok but is a b**** to clean free of powder residue after shooting as that rough texture seems to hold onto the powder and dirt. It would have been so much simpler to just keep it clean so that never happened.
