I had a brick of them and would guess that there were at least 25% failed to fire. Also tends to be a dirty ammo, leaving a lot of residue in the barrel.
I never had any luck with them also and in my area there priced a lot higher than all the other bulk .22 ammo.
Now, what I have had lots of luck with is the Winchester Wildcats.
My .22's chew through them like a dog on a bone.
I have the odd FTF, but for the price, I can live with it.