Awesome! Thanks for sharing that and the data. On paper, I'd say that load is on the spicy side, so I'd certainly not suggest anyone just jump into that from the start; best to ladder into what works for obvious reasons. However, it is clearly working for him. But most, even with a high end load like that, are not running them quite that fast. One or two things going on there, perhaps a combination of the two. First in that the barrel is inherently on the fast side, based on fit and finish. Second is the possibility of barrel treatment (and I'd like to know what he's doing here). The use of HbN and/or Graphene bore treatments are known to speed things up. It's be interesting to know if either or both are being used here.Dan, a buddy of mine, 74 years old, and full tilt addicted to ELR pushes your 256 gr .338’ s at 3404 FPS, with no pressure issues!, RL 26, from a 32” gain twist 338 Lapua40deg improved. At 1642 yards he was shooting a 1/4 MOA, and hitting 6” thick rocks at will. It’s was the best performance from a rifle at that distance that I have seen. What I leaned that day was, accurate velocity is your friend especially in the wind, I’m not crazy about long barrels but they have their place, RL 26 is a good substitute for N570 in that cartridge, and lathe turned solids are an improvement over cap and core bullets, I was shooting a 300 Norma with cap and core and was way out of the league of the solid bullets moving at 3400.
"full tilt addicted to ELR"; I might have to steal that one.