My dad used Rhino Choke and Nitro Hevi 4x5x7 last season, and I used Nitro Hevi 4x5x7 out of a MAD SuperMax choke. My dad killed 2 in 2 shots and I killed 8 in 9 shots. The one I had to shoot twice was running on the first shot. We shot a couple of birds at 40+ yards and just dusted them. The patterns in both chokes are very good. If you have a good aftermarket choke, it will most likely perform well with the Nitro Ammo. Can't say enough about Nitro Ammo, I won't ever shoot factory loads again! Just got a Browning Gold 10ga and will buy Rhino/Nitro for it.
WM