I would recommend 20, 30, 40. Like previously stated, you probably can't get your pins any closer. I know I can't. Practice at 30 and get good and confident. Step back to 35 (aim between your 30 and 40 pins). Then move back in closer and you will be surprised how accurate you are. Keep doing this and eventually 40 yards will be an easy shot (at a target). Have fun and keep us posted.