Far be it from me to be YOUR critic, but sounds like too many rounds compensating for a second choice weapon to me. If you are thinking fight instead of escape, shouldn't you be thinking more offensive?
My attitude is that which I was raised with, reinforced by my early military training, which was as a tank crewman.
At the age of ten, when an uninvited or unannounced guest came to our apartment door, he was met by my father, with either his M1 carbine or a 9mm submachinegun in hand. And from the bedroom doorway across our kitchenette, I could cover him with whichever weapon he was not using.
as a young tanker, we were reasonably well trained in the use of the M1911A1 .45, and it was the weapon generally used when we stood inspection, or pulled motor pool or finance office guard details. But that is not what a tank crewdawg really either uses a .45 for or fights with, and aboard our M48s we also had a pair of .45 M3/M3A1 greaseguns, a .30 caliber M37 Browning machinegun with six thousand rounds of ammo, an M2 .50 Caliber with a thousand more, and a superbly accurate M41 90mm main gun with 60 rounds in a variety of flavours.
If trouble comes calling, and I can get to my truck, I'm almost as well-equipped as I was back then. And the 30 rounds I've got for my Commander is the same quantity found in a M3 Greasegun [or old Thompson SMGs] magazine.