A .458 Lott that is hardly recoiling at all? In a handgun? With that tiny muzzle break? Sorry- dont think so.I have a .458 Win Mag in a 10 lb rifle and it kicks the crap out of me with factory loads!
I'm sticking to my guns here. And I am well familiar with muzzle breaks. I have them on guns too. But for every action there is an equal and opposite reaction. That will never change. If that rifle is shooting a 500 grain bullet at 2000fps or so and hardly even moving then I will say I would have to see it with my own eyes.