We started our Saturday evenin' shoot at 600 mards with GGG 7.62x51 in our DTA: no problems there apart from we miffed the markers by sending them a radio message suggesting, ever so politely, that they should remember to mark our fall of shot with the orange disc. "We are!" came the reply, 'we just haven't needed to move it for the last three rounds." We apologised. Smugly.
Next up was our AIA jungle carbine chambered for 7.62x39. With Tula milsurp we needed to hold over by almost 7 feet at 600 mards and the dispersion was far greater than with the DTA. We could keep all our rounds in the black, but no better than that. Still, in a brisk breeze at 600 mards, we were happy.
After that, with fear and trepidation, we chambered a few rounds of our big 'efty 247 gn cast, gas checked, boolits sat atop 23.3 grains of Alliant 2400. We squeezed the trigger gently and ... Bang! Not a big BANG, but a nice, safe Bang ! All body and rifle parts intact. The empty case ejected easily and the primer showed no pressure signs. A modicum of sooting around the case neck but nothing worse than the GGG cases. We fired 4 more rounds, inspecting each case carefully. No apparent issues. The group size at 600 mards was nowhere near as tight as with a condom bullet, but this was our first effort and we were happy to keep them all in the four ring. We thinks there's plenty of scope for improvement. Slowly and carefully.
Relieved that we were still alive, we next loaded some subsonic rounds for a 100 mard shoot. These were the 247 gas checked lead boolit sat over a starting load of 8.6 grains of Ramshot Zip, and incrementing up in 0.1 grain steps to 9.6 grains. All worked well, giving a pleasing phut... and no pressure signs. The rounds loaded at 9.1 grains seemed particularly good, grouping to 1.5 inches at 100 mards.
We think we're going to like this efty cast boolit malarkey...
