lotech
07-14-2017, 04:49 PM
For you guys that like to shoot heavy bullets in the 7.62x39...I did extensive work with this about twenty or more years ago using a couple of limited edition Ruger stainless 77 MKII limited edition guns. I used many bullets between about 160 and 215 grains. Still have one of the guns but lost all interest in the cartridge years ago; never could figure out what it was good for. Recently, for some reason, I decided to try the #314299 (ww, sized .311", mould hollow-pointed by Erik Ohlen). I use this bullet in most of my .30 cal. guns because it's easy to work up an accurate load.
Tried this bullet this morning with a few powders at muzzle velocities up to around 1,700 fps. No data available for this bullet in the 7.62x39 that I'm aware of, so I think that's about as fast as I want to go with this bullet. Using a not-so-bright very old Weaver K-4 for group shooting at 100 yards, I got several groups in the 1.25" - 1.5" range, but I think I might be able to improve on that. Bullets were seated to slightly engrave and I used H4895, TAC, 1680, and Reloder7. Surprisingly, at least to me, Reloder 7 loads grouped poorly; H4895 was better, but TAC and 1680 were clearly the winners. No leading that I could see.
Brass was old Remington with small primer pockets and CCI400 primers. I've compared jacketed loads using Remington brass and Winchester brass with large primers. Velocities and points of impact were the same, something I wouldn't have figured on. Whether the two are interchangeable with cast loads, I don't know.
Tried this bullet this morning with a few powders at muzzle velocities up to around 1,700 fps. No data available for this bullet in the 7.62x39 that I'm aware of, so I think that's about as fast as I want to go with this bullet. Using a not-so-bright very old Weaver K-4 for group shooting at 100 yards, I got several groups in the 1.25" - 1.5" range, but I think I might be able to improve on that. Bullets were seated to slightly engrave and I used H4895, TAC, 1680, and Reloder7. Surprisingly, at least to me, Reloder 7 loads grouped poorly; H4895 was better, but TAC and 1680 were clearly the winners. No leading that I could see.
Brass was old Remington with small primer pockets and CCI400 primers. I've compared jacketed loads using Remington brass and Winchester brass with large primers. Velocities and points of impact were the same, something I wouldn't have figured on. Whether the two are interchangeable with cast loads, I don't know.