Can't say how it would work in a Shield, but I have shot thousands of rounds of Blazer 9mm, both aluminum- and brass-cased, over the years, with no complaints except that it's maybe a little on the dirty side. But really no worse than a lot of others.

I've bought their aluminum-cased 158gr .357 hollowpoints for as little a $16/box at guns shows, and snap up all I see. I've still got half-a-case downstairs. It's a little low-powered for .357, but that's fine with me.