Ok, to come clean, I was trained to shoot by the British Army. My personal weapon was a 7.62mm Nato (semi-automatic, no fully automatic) L1A1 SLR. 20 round magazine. Normal carry load of 5 magazine's. That's 100 rounds of ammo. We were always told that that was all the ammo you would get for a battle. So make every round count. I have to say that with one of them in my hands, no thing, neither man nor mob or beast worries me. What does worry me is the spray and pray portrayed by Hollywood. Hence my preferance for single shot weapons. However, I take your point. What magazine capacity would you suggest? 5 rounds with a 10 or 20 round magazine(s) in the bag?