I shot my new Rhino Choke today vs: my Rem Ventilator. Both was shot at 42 yards. My gun was a Rem 870 Super-Mag, shooting Nitro Hevi-Shot #5's, 2 1/4oz loads. The Rhino came out on top , but not by much. Here are some pics. The top 2 pics are the same with one being a close-up, same with the bottom 2 pics.
These 2 where shot with the Rhino .660 ported Choke there was a total of 232 hits in the 11"X11" target with about 45 in head and neck.
These 2 where shot with the Remington Ventilator .655 ported Choke there was 173 hits in the target with about 35 in the head and neck.