I have two 686 plus 4" Smith & Wesson revolvers that I shoot very well. Love those guns. I wanted a more concealable gun, so I bought a 686 plus with the 2-1/2" barrel. Identical gun, except the barrel. Can't shoot it anywhere near as well as the 4". Past 7 yards is all over the place. Can easily stay on the target two to three times that distance with either 4". So far I have put about 1000 rounds through it with no inprovement. Bought some boot grips for it to make it more concealable, but switched back to the factory Hogue, thinking that might make a difference. It didn't. Also replaced the springs with reduced tension Wolf to lighten the heavy trigger pull. Didn't seem to help accuracy. Does anyone else have a 686 2-1/2" that they have a problem shooting? Since I can shoot a fairly good group at 21 feet, shouldn't it shoot the same at 50?