I was hunting feral hogs with a new to me Freedom Arms revolver in 454. The hogs were 95 yards out and my first shot took a sow down. I was able to call the hogs back and took a shot at another sow but to my surprise it never dropped. Later after doing some load development I was trying to figure out why at 50 yards I could get it zeroed and then later it would be 2-3" off. I thought it was due to recoil (it hurt to shoot, my S&W 500 was easier to shoot) and I was flinching or the scope was bad. It turns out the factory load I was using would shift 2-3" after the first shot when the barrel warmed up. If I zeroed when hot it would be off when cold and vice versa. So that pig I thought I missed was due to it probably being off 4 or more inches at 100 yards since it was zeroed cold.
I bought the revolved off Gunbroker and it looked new, very light drag marks. I called Freedom Arms and they gave me a manufacturer date of the 90's (this was several years ago). I think the recoil was so bad the original owner did not shoot it. I sent it off to Magna-Port to get ported and have an action job and it is night and day to how it shot before. The porting was a game changer. I also started hand loading and have not had it shift off zero but I have never had a firearm shift that much after the first shot.
I bought the revolved off Gunbroker and it looked new, very light drag marks. I called Freedom Arms and they gave me a manufacturer date of the 90's (this was several years ago). I think the recoil was so bad the original owner did not shoot it. I sent it off to Magna-Port to get ported and have an action job and it is night and day to how it shot before. The porting was a game changer. I also started hand loading and have not had it shift off zero but I have never had a firearm shift that much after the first shot.