ds, they assured me at Nitro that their ammo would' nt hurt my choke or barrel in any way. The shot is coated to prevent damage to where I think the Remington hevi-shot is not. I shot the extra full choke the first year I had my gun and bought the Ventilator the second year, I compared the 2 with the same loads and the same distance and could' nt believe the difference the Ventilator made. You will like it in your Rem. Super Mag.