I've had no fuctionality issues with Blazer/CCI ammo, but man - my Sig GSR 1911 hates the stuff for accuracy.
In fact, when I first bought my GSR (being a big SigSauer fan) my first rounds through it were Blazer/CCI. I was so incredibly disappointed with the accuracy that I seriously considered trading it or selling it immediately for an HK USP. However, I tired a different brand of ammo and - much more to my initial expectations - I was grouping like I KNEW this gun should group. (At 30' I let my girlfriend shoot and group center mass, while I shoot the smaller silhouette in the corner - slow fire of course. The GSR and P229 .40 group this tightly with 'ease.')
No more Blazer ammo through my 1911, unless it's all CQB/defensive pistol drills for me. Just my experience.