Finally got my Ruger No. 1 out to where I could shoot 300 yards.
This is Hornady 105 grain bthps loaded over H4350 in Sig brass and BR-2 primers.
4 of the shots went into 1/2". that other shot opened it up to 1.3"
This is my project rifle barreled by PacNor in 6mm CM. It has the speed hammer installed. I have not drilled the hanger for a set screw yet and simply have a thick rubber grommet between the hanger and barrel.
That is a 3" circle which is way too big even at 300 yards.