Bart, I guess Im not sure why youd have to take it to 1k if the 100 yard tuning works? If the cone of dispersion is what happens, then tune to .1 with 10 es and you will shoot 2"s with good bullets. I loaded at the range so I could change powder charge for temp changes. I was using rl15 and we have large swings. Id load for each day. I would also tune at that range the day before a shoot. Actually it was my only tuning I would do. I live in a wind tunnel so I wont waste my time where I live. 100% of my tuning and loading was done at deep creek range on the match weekend. I really dont mean to come off as rude, but I am talking 1k agg records. Thats whom I want my 1k advice from. I have a few friends from your world. Dana English, Jim Borden, I would never convince them of this either. I think I have posted enough on LR tuning for a lifetime, its out there Im done on the subject. I know if I wanted to shoot a ppc, Id take the advise of you or Tony Boyer and run with it. So when guys Like Tom, Shawn, Mat Kline, leo Anderson, exc. talk 1k I listen.