I fired Cutting Edge 350, 375, 400, and 425s. I also fired several ZA prototypes.
I just started testing the 400 and 425 CE in a 6-9 gain twist. Up close they are extremely accurate. I haven't got to stretch it out yet. I had this barrel so I chambered it on a Lawton 8500 just to see how it compared to the 6.5-13. Also if someone makes a 375 7 calibers in length I will use this barrel to test it.