20 caliber dewey rod works great, rimfire barrels are .220
If wholesale out of rods let me know, I have a half a dozen new ones in stock, as for sighting it in your best chance is to pull the bolt and line the barrel up on the target by eye and then dial in the scope, like we used to do when we were wiser with our money and gimmicks were for the other guys we used to laugh at........lol