I haven't fired mine that much and used the, ugh, steel cased ammo that was shipped with the gun. - But an internet friend told me his ten round mag has a part time problem of not feeding the last round from a full mag? I don't know any other particulars. I have a different question for my gun. In reloading I ordered the classic 215 gr RN for my SMLE. Same NO4 MK I style rifle made into a pseudo scout. Is that rifling twist good? I figured it might have been fine as the guys pounding the trails with boots might find the 215 gr ammo issued to them. I haven't run a tight patch to see. Just thought I would ask the question before I load some? I can get other sizes but I go for long and heavy for caliber bullets for most guns. Steve R.? Be Well, Packy.
