Regulating is a relative term. I have guns (bolt guns) that I "regulate" to the original sights. I don't want to Change the sights. This is the joy of he gun or rifle. Find what load and bullet it was "regulated" for.
My 9.3X57's regulate well to the original sights with 286 grain bullets. They do not with the 232 gr.
Ok, I am spliting hair. But, it is regulating. Just not Barrel to Barrel. It all boils down to what shoots to the Sights and point of Aim. My three and 1/2 cents (maybe pesos here) on the subject.