Alot of cleaning regimes date back to the era of corrosive primers. Then it was absolutely imperative to clean and then clean again before storage and maybe oil up the bore. Just take care cleaning your bore and all will be fine. Remember all the re-import M-1 carbines that could not shoot tight groups even with sharp bores? Foreigners with steel rods cleaning from the muzzle. Luckily the barrels could be recrowned or rebated to get back to an unworn transition and often fix the issue. I either store guns with thin film lube or none at all in the bores. Indoors in a climate control house, no rust issues after many years. The only time I ever got rust was a silicate moisture absorbent canister in a safe too close to a blued gun and as it drew moisture it also drew it to that gun or something. Minor dust rust that wiped off.