I just bought a type 38 rifle. Bought some Norma 6.5 ammo... $38 for a box..wow! I do reload and already bought the dies. This rifle was packed in cosmoline for a long time. I cleaned it real good and test fired it at the range. All twenty rounds are showing case bulging only half way around the case maybe half inch up from the base...not real bad but it is noticeable. My question is..is this normal for a Jap military rifle to have a oversized chamber to allow for dirt etc..? and why did it have bulging only half way around? The bore is like brand new..chrome??? Numbers all match and the rifle is in excellent condition. 27 series, serial #89,xxx Nagoya pre-war. First time I have ownwd a jap. What do you think? Thank you, Mark B.