RE: .44 v. .45
Once everything is right, a semi auto should never malfunction. Limp wristing them is about the only thuing that should ever cause a malfuntion if you are using good ammo and the pistol has been tuned to work well. My last 1911 went 5000 Plus rounds and never malfunctioned. I sold it at that point but not for any reason except that I quit competition shooting and the gun was worth to darn much to keep in a drawer. I now carry a Ruger 45 Auto and I don't expect that it will ever malfunction as I have never had one do so.