After reading the thread about top tier priming tools, I had a nagging question that I haven't been able to get a good answer for by searching the interwebz. You go through your load development have your load nailed down showing good grouping down range say 1/2 moa at 500yrds on paper. So now you see this new to you idea of seating your primers to a specific depth. I never gave it much thought just seated em fully. What benefits should a guy expect to see? Tighten up groups even more from your 1/2 moa load, lower your E.S. a bit? How much of an improvement could a guy stand to realize? My thinking is that with all the other factors that influence down range velocity and trajectory, the things that change through out the day. Temp, baro, humidity, not to mention shifty winds, hell even ambient light and direction can start coming into play. Is any improvment enough that an above average LR shooter would be able to realize it above the pile of other variables we account for? or is this one of those things that you can see on a damn good chrony and it just make a guy feel better about his loads? Don't get me wrong I'm all about the "I just do it because it makes me feel better about it"