Thanks guys, I'm really looking forward to getting this big guy up and running. BigDog---barrel length is 20" plus brake. It'll be interesting the difference in noise and recoil with & without the brake. I had Ed build it like SafariKid's with a shorter barrel and a weight that you can carry all day, around 10lbs. My 600 #1 weighs 10.5 lbs in full rig and is plenty manageable. Ed is testing it currently with a load of 155 grs H4350 and Woodleigh 900gr softs. I don't know what his speed is running out of this shorter barrel. I will keep it somewhat reasonable by running this bullet to around 2000-2200 fps. BigDog---what kind of loads have you run yours and what speed do you get? I think you have a longer barrel don't you?