The plot thickens ...
I went back out to the range this afternoon with the Ruger SFAR after re-installing the muzzle break. When I re-installed it I thought of the Browning BOSS muzzle break that Browning came out with decades ago. For those of you that do not know about the BOSS, it was a muzzle break that could be adjusted up and down the end of the barrel within about a 3/4" range so that a shooter could find the "sweet spot" for maximum accuracy of a given load. I therefore made a conscious choice to position the muzzle break on the SFAR about 3/16" from the original spot. I changed nothing else. I shot the same loads as before, but this time the best loads grouped under an inch at 100 yards! Perhaps this information will be helpful to others that run into a similar situation.
