With the number of different rifles by different manufacturers, made at different times, and the way chamber reaming dies are made and then wear with use, it is not unusual to see a plethora of different results among so many users even when using the exact same components. Our only real world option is to WORK UP to what is the safest, most accurate loading for our own particular rifle/chamber combination with the components we have available. I have been a long time fan of the 6.5 x 55SE but my experience has always been with high quality modern actions. I can get more velocity without pressure signs other than a very slight shiny mark from the extractor, but found usually the most accurate load was at a lower velocity. For example I can drive 143gn ELD-X to 2850fps (Magnetospeed chrono) but the groups open up to almost an inch for 5 shots at 100yds. But by reducing the load ( to what is a very mild load in my current Tikka T3 SS Varmint) I get 2716fps and .625" 5 shot groups with barely discernable hits where the projectiles have gone through the same hole. At 73 years of age the group size is more a product of my inability to shoot as well as I once could and not a rifle induced problem. I seat .002" from the lands and the load that works best is 48gns of RE22, Lapua cases, Rem. 9.5 primers. Having said all that I repeat, this load is great in this particular rifle. There are so many great products available today for the 6.5 calibre, we just have to safely experiment until we find exactly what works best, match the projectile to the game and find the sweet spot for each projectile. Forums such as this give a fantastic wealth of diverse information. Thanks folks.