David, Ultramax is actually good ammo. I have shot 40S&W, 357Sig, 9mm and 223 for many years without issue. Their 223 68gr JHP ammunition is one of the most accurate loads in my rifles other than my hand loads. Since guns can have different tolerances, I always recommend buying acouple of boxes to test in your gun. If it passes muster, then buy in bulk.

You should have zero problems using Ultramax in your Glock 33.

Ultramax is top rate ammo

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Hi David, This is excellent ammo. I've shot it in 357 which is very accurate.