I just noticed that. The little quirks like that are fascinating to me.I like the barrel step! Instead of a smooth taper like on mine (3569T) yours just has an abrupt step. Never noticed that before. Its crazy how much rougher the finish on your rifle is compared to mine as well, only a few hundred apart.
Does anyone know what may have caused the small stains on the stock? They seem very old. Oil? Blood? Bad wood?