Buddy just had one built just under 19 pds.. less optics .. I’ve got one 24 .. terminator brakes on both.. little hard to stay on target.. but not to bad recoil wise..
I used it in my last barrel 408 .. which I bought used … so not sure on round count.. but rebarreled to 375 running h50bmg … getting single digit spreads .. chugging around 2990fps on 400 gr lazers…