The Campro 55's are actually very well made. I prefer them over the Hornady's for two reasons, obviously the cost is about half but also the cannelure postion. The Hornady bullet is designed to be loaded at a 2.200" col where the Campro is designed to be loaded at a 2.250" col, this lets you load them slightly hotter than the Hornady's without increasing the pressure. I stick to ball powder for these, its kind of counter productive IMO to buy cheap bullets and waste money on expensive extruded powder and expecting sub MOA accuracy. In my test's the accuracy of the Campro is nearly as good as the Hornady, especially if you take your time tailoring a load to your rifle. It's hard to beat for a cheap plinking round, best of all they're made in Canada!
I also hear there is a 62gr .224 FMJ in the works, they should shoot a little better in tighter twist barrels!