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WWB seems to consistently be on the lower end of the quality scale of the name-brand American ammo makers (with Remington, Speer, Federal being much more consistently reliable). For a while during the 2008 ammo shortage Winchester/Olin even removed the "Made in the USA" stamp from WWB because much of the ammo was made in eastern Europe (like Monarch) and packaged in WWB boxes because Winchester/Olin couldn't crank out ammo quickly enough. That European-made WWB was even worse than the American made stuff - very dirty.

That said, in the last year or so, WWB has been fine every time I've shot it. Just ran a 100-round box of 9mm WWB from Academy through a Kahr last week with not a single problem. And I've shot probably 400-plus rounds of 9mm WWB at various IDPA local matches, mainly through a S&W M&P, without a single problem. In my experience, WWB is not as inherently accurate as quality practice ammo like Speer Lawman, but we're talking about minor differences.