I took a day and a half to form some 223 ack imp brass and ended up with 32 dead gh and 35 pieces of nicely formed brass. Yeah, I missed 3. Shots were only to a little over 300 yds with 50 gr vmax over 8208 @ 3400 fps. I will be loading the AI with 53 gr vmax @ close to 3600 fps. I am very happy with this CBI barrel. Season total is at 87.