I could cut some nice groups using H335 too.
What was your cleaning routine and interval for that Ruger?
I clean after every use. Use shooters choice, so it takes care of the copper for the most part. Probably works well enough on powder fouling too. That Ruger was a great rifle. I foolishly sold it after I got into AR's. Figured I didn't need a 223 rem bolt gun. Now I miss the dang thing. It was very accurate for a Ruger..