Cinch, I have had one of these sitting around for months ,and after seeing this post I desided to find out if this is VooDoo or Science. A friend of mine owns a Ruger in 300WM that dispite all efforts (new stock, pillar bedding, bbl break in, and much testing with the reloading) this gun shoots 1.25" groups at best . We headed to the range this morning at 6:30 to see if the guizmo works.
First we shot a couple of control groups, Yep 1.25" then we oiled the bbl and slid the device on 1.5"s and shot a group. Low and behold a 5/8" triangle and point of impact had moved 1.5"s right. Next we slid it back another 1.5", the group had the first two close w/ the third 1" left. point of impact was 2 more inches right and an inch higher.We moved the guizmo two more times with similar results. Two almost touching and one off alittle but all were better than before. Next we moved forward to the same spot as the 5/8" group to see if it was a fluke. Result was a nice tiangle 9/16th " group so we left it there and shot the last nine shots at the Gongs at 457yds-565 and 706yds.At 457 it shot at 2"s- 565 was at 2.5"s-706 was 3.75"s. Certainly nothing special for the LRH crowd but this gun had a hard time shooting 7 or 8" groups at 600 before. I suspect that it would mean little on a good shooting gun but on an unruly beast that doesn't shoot what have you got to lose (12 bucks?) FWIW---7mmRHB