LocnLod, I don't recall the record break down as to whether the 38 special lead round nose was even mentioned. The 45 acp was near the top, but not as well as one might expect. I have built and carried a lot of 1911s in 45 acp, but was always aware of their limitations. The comparisons are varied in a L.E. stand point and I will try and give you but one example as they are endless.
45 acp ball will many time glance off, and not penetrate a car windshield. A flat point or wide mouth hollow point will most always penetrate the same windshield in that caliber. A 9mm ball will sometimes glance off of said windshield but will usually penetrate it, as will the hollow point versions of the 9mm.
A 357 magnum will most always penetrate the same windshield in ANY bullet configuration. The reasons are more along the lines of the balance of power, and BULLET CONFIGURATION. This is also true involving one shot stops on BGs.
I am not in this to promote MY PERSONAL CHOICE, or give theories, I am giving information gained from stats of actual street fights, and what was learned from them. Another example is that a 9mm ball will out penetrate a 357 magnum 125grain JHP many times. Problem in this example is not power, but bullet configuration. An additional aspect is, that a 9mm hollow point shooting thru clothing will many times act as a cookie cutter, and the hollow point will fill with material and thereby negate the hydraulics (body fluids) needed to make the hollow point work,and the round literally becomes a ball round. The 357 mag 125 grain JHP is the balance of power, soft point-hollow point, AND bullet configuration. Just as a 9mm usually bounce off a bone, the 357 mag breaks the bone.
When I carried a 45 acp I carried a FLAT POINT for all these reasons. I carry the 357 magnum now for several reasons. I am retired, and no longer looking for a fight, it's absolute reliability in functioning, the excellent balance in power, penetration and it's inherent versatility. It has proven itself to me thru personal experience when the chips were down, and friends that were fellow officers giving me personally their accounts of their results in an actual fight.
I'm not selling guns, I'm not knockin any one's choice in what they carry. I'm merely stating what I know from personal experience, and the experience of other officers. After 20 years on the street, and 18 of them as an instructor, SWAT Team leader and trainer, I am of the opinion the street officer in the 1970s to today's street officer, didn't need a new weapon. He needed more disciplined training, and more ammo to practice with.
As for your carry at the present in 45acp. I would as a civilian consider myself well armed with the 45 acp given it's record. I will also say as once addicted 1911 man, that today there are far more reliable platforms in that caliber. As a Glock armorer and past builder of some very nice, and reliable 1911s, I would choose the Glock pending and imminent fight. Not because of round capcity but, because of reliability, and I don't really care whom built the 1911.jmo