Zak, I tried a search and couldn't find info. I have an ultra 7 30 cal which I LOVE! I am getting an ultra 9 and am thinking an 223 ultra 7 for 204R, 223, etc. I know ultra 7 and 9 are good on 204/223, but I really don't like having to change them too often. Question - is the ultra 7 223 quieter than the ultra 9 on these smaller calibers?