My 505 Gibbs weighs 10 lbs even, I dont run a scope on it, the 600 gr Woodleighs at 2450 fps really boot, I have backed this round of reloads back down to a more civil 2250 fps.
Gunner
You're an animal! When I first fired my .500 A-Sq with 600 grains at 2450 I thought the rifle had hurt me. It just was all over me. My right arm was numb for 30 minutes aftwerwards, and I was really fretting that I might not get the feeling back until it started tingling again. I wrote the editor of Rifle magazine to ask him about big loads since I'd seen some articles in the rag and thought he might know. He did; told me to pack the case with H-4831 and I'd be good. This was back in 1996. My rifle was 11.25 pounds. The memory still makes me dizzy.
I started loading shells with H-1000 and H-870 then began to bring the velocity back up with IMR-7828 and RL-22 in stages. It took me a year before I could pull the laynard at full velocity again. Yeesh.
