Determined,
If your gun and current choke does not put at least 220 pellets in a 10 inch circle at 40 yards you will benefit from the Rhino tube. My Mossy put 268 pellets in that 10" circle at a measured 40 yards on the range. I am completely sold.
I took two Rios, both at about 45 yards last April and they were stone dead. I did have a hard time judging distance in that more open country and that choke/load combo made my hunt very successful. The shortest set of spurs on the pair was a wickedly sharp set that were 1 5/16"!