I have shot several prone matches over the last 4 years and I always fall apart on my last relay. On the last match I only had 9 shots left for the day and was down only 5 points. Eight of the next 9 were in the nine ring! What went wrong? I have decided that fatigue was most likely the culprit. Yes Dan I have found that most of my guns shoot tighter if I don’t put downward pressure on the stock with thumb. I think the most important thing is to hold it the same every shot and try not to force the gun onto target by applying pressure anywhere, But like you said we are all still learning.