Set accuracy goals for yourself and stick with em. Most of the crazy rabbit holes that folks fall down is unneeded if you are just making a plinking round IMO.

I just recently started tumbling my brass but prior to that, my ugly used brass shot .5moa all day. (not range brass) In my case tumbling just makes things look good so I do it now, but it doesn't help with accuracy.

Make sure you measure and verify the consistency of the powder throw. I could never get my RCBS one to throw the same amount consistently and now use a chargemaster.