I have two different types of the winchester super X, the stuff that comes in the nice plastic cases 100 rounds per ran great, the stuff in the bulk box had a few dud rounds but when I picked up the 1000 round brick it ended up in the 5 to 6 cent per round range so hard to complain about really. Plus shooting with it gives good practice for feed and fire failure issues IMHO, lets you practice clearing issues as fast as possible which will matter a whole lot if you ever have an issue when it counts.
I'm glad I have it but the bulk pack stuff should work. Just a bad product.