04-08-2021, 12:56 AM
Range sessions can be much more productive when people don't shoot tracers and start fires. And also when the concrete isn't slippery and your bipod doesn't move when you load it. Picked up where I left off this morning. One shot each at 200, 300, and 400 meters and everything was spot on. The TYL rack at 500 meters was freshly painted and no one had worked it, so why not! Held right edge on the 18" to get a solid read on the wind and then it was dead center on each shot at 12", 8"and 6" with a reticle elevation hold. Well maybe not dead center, but the 8" and 6" were no more than 1" from center. So that advertised G7 of .280 for the 105 RDF is spot on this far. I'm also guessing that if Rubin was put in some sort of bench rest rig and manned by someone who is actually halfway decent at shooting paper, he would shoot 1/2 MOA all day long.
Not to be outdone by her safe mate, GiGi proceeded to put her shots right on top of Rubin's - the 6" looked like one splatter.
Ave velocity was 2446 vs 2448 when I last Magnetto'd 26.8 grains and the temp was 9 degrees cooler, so pretty much in line with what one would expect from Varget. Hoping to get to a range south of town in the desert next week where they allegedly have permanent steel from 700 to 1100. I don't know if they are swingers or static and if they are backed by berms, but it's worth checking out and hopefully confirm that my little 6.84 lb carbine is indeed an 1100 yarder.
My biggest concern with a 3 groove 7 twist barrel is/was possible bullet deformation since not only is the RPM relatively high, but that each groove would place a higher incidence of lateral force on the jacket with only 3 of them. So far, so good. Although there may be something that manifests itself further downrange, I find it hard to believe it wouldn't cause some sort of increased dispersion at 550.
Not to be outdone by her safe mate, GiGi proceeded to put her shots right on top of Rubin's - the 6" looked like one splatter.
Ave velocity was 2446 vs 2448 when I last Magnetto'd 26.8 grains and the temp was 9 degrees cooler, so pretty much in line with what one would expect from Varget. Hoping to get to a range south of town in the desert next week where they allegedly have permanent steel from 700 to 1100. I don't know if they are swingers or static and if they are backed by berms, but it's worth checking out and hopefully confirm that my little 6.84 lb carbine is indeed an 1100 yarder.
My biggest concern with a 3 groove 7 twist barrel is/was possible bullet deformation since not only is the RPM relatively high, but that each groove would place a higher incidence of lateral force on the jacket with only 3 of them. So far, so good. Although there may be something that manifests itself further downrange, I find it hard to believe it wouldn't cause some sort of increased dispersion at 550.