Bart B, This is a follow up to earlier, about a friend of mines tight group. I new his record, but did not realize he has shot below it many times. He shoots light and heavy gun Penn. rules. He said his 10 ring was 7''? Anyway I had a chance to go with him today and he was testing loads. He took sighters at clay pigeons, and he said he likes to warm up his gun.HE shot about 45 shots, groups of 5,sets of ten on 2 targets. I looked at my watch, about 8-10 seconds for 5.1000 yrd. I saw him shoot best 7/8 vert.2 7/8 horizontal, he did this twice, under 3'' and like 1/14 vert. one group was 7 thous. off, and he said this was rare for that larger jump,6mm dasher.His largest group was 5 1/8, and he had a 3, 2 group where 3 were in 1''. I have never been around someone that can shot like that so I WAS AMAZED. H e records everything. At his house he showed me a good 1/2 doz. targets that where under 3'', he saves. HE had back to back targets like that recent from his heavy gun.We left at 4am to shot to have good coditions, between driving back and forth he had to do a 30'' windage adjust.HE basically said the rifle will do it but needs optimum conditions that are not often at matches.I can see your avid LR so thought this interesting.