Sorry can't tell you about the SRO in 9mm but I will comment on reliability in a full size 1911.
I have 2 full size 1911-9mm pistols.
One is a fusion firearms 6" longslide with 600 rounds through it w/zero malfunctions.
The other one is a Dan Wesson pointman 9 (5") with 100 rounds through it w/zero malfunctions.
I use the springfield designed metalform magazines in both as they were recommended to me by fusion when I bought that pistol.
While neither pistol has lots of rounds through them they both have performed flawlessly.