I've been using shockwaves for 3 years now, the 250 grain bullets.
From the closest of about 35 or 40 yards to nearly 200, I have had nothing but great performance.
I load pretty hot too, 130 grainsof 777 loose.

Exactly what are your powder loads and how do you know the bullets did not expand? Did you recover any?
I have heard people say things like this, but generally they say they shot a deer and never recovered it, then blame it on the bullet and say it did not perform.

Hank