just to clarify....
use swiss 3fg which is marked number 2 on tub and is the one on the right in your pic.
best person on here to ask about the ruger accuracy is rick,,,,,nightstalker.
better hand gun shooter than me and was very accurate with his ruger but he used triple 7 and ,456 conicals
think round balls was just as good but he like the clean holes better with conicals,
pm him and ask him but dont mention i said he is a better shot than me lol