Throw out any results with Blazer aluminum ammo. A lot of semi-autos, especially 1911s, don't like them. I won't shoot them in semi-autos, only in revolvers.
I have had at least one revolver that did not like Blazer aluminum cased ammo.
They would stick and not extract. That was a .44Spl S&W 396 with a Scandium cylinder.
Never found aluminum cased ammo to try with my .38, .357 or .45acp Scandium revolvers, so I cannot comment on whether this was a Scandium/aluminum incompatibility.
And I no longer own these revolvers. But I also started handloading since then, so I have no reason to buy aluminum cased ammo. Brass seems to work just fine with everything. Probably why they selected brass as a case material way back when...
Aren't 9mm 1911s notoriously unreliable? There seem to be a few exceptions like the Springfield EMP,
My experience with the EMP is exactly the opposite. I owned two...one initial purchase, returned to SA twice and eventually replaced. Replacement went back twice.
Springfield may have it figured out now. I sure hope so. Every time I see one, I say, "Great idea, -CENSORED--CENSORED--CENSORED--CENSORED--poor execution". I'm not tempted to try again.
I currently have two 3" Kimber .45acp 1911s that weigh the same, fit the same holsters, and actually work 100% of the time. And have owned several others that did the same.
Again, IME, the EMP was a great idea executed incredibly poorly.