I've never cared much for Blazer ammo. It never seemed to me to be all that much less expensive than brass cased ammo, considering the usefulness and value of the brass casing in the other ammo.
I have used it. It seemed accurate and generally reliable enough...though I agree that it seemed a bit dirtier than most other brands. However, an incident occurred some 7 or so years ago, that caused me to quit using Blazer altogether.
A friend and I were out shooting in the desert. At one point, we were taking turns shooting my Model of 1988 S&W M.625, in .45 ACP. We were using my friend's Blazer ammo. At one point my friend was shooting it, and was shooting DA at a moderate pace. After several "BOOMS" there was a distinctly weak "pop". I hurriedly called out to my friend to not fire again...fortunately he was quite experienced, and noted the different sound, and ceased firing.
Upon examination of the firearm, we discovered the bullet lodged roughly midway down the barrel, an obvious squib load. I was lucky that my friend was so observant, and that he didn't happen to have been firing more rapidly at that moment...or I might have been left with a bulged, or possibly burst, barrel.
Now, I'm aware that one lone squib load does not mean that all Blazer ammo is dangerous, or worthless. I recognize that many out there have fired thousands, perhaps ten of thousands of rounds of Blazer, and have had no similar issues. It's just one of those things that, when it happens to you, it tends to sour you on the product.
I have to admit though...with the current ammo shortages, I find myself a bit short of .357 Magnum. I've been searching around, and at times the most affordable option has been Blazer. I've not quite found the deal I'm looking for yet...and likely won't now, until this whole current episode dies down...but I have considering buying some more Blazer, admitting to myself that my bias is likely unwarranted.
Still...old memories, (especially thoughts of a treasured and somewhat rare S&W almost being potentially ruined) die hard.
Tim