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went to the range today and tested a few loads in the 20" 7.62x39mmUSA
20 grains lil gun 110 V-MAX = 2720 fps
20 grains lil gun 125 TNT = 2515 fps
22 grains lil gun 110 V-MAX = 2736 fps
22 grains lil gun 125 TNT = 2555 fps
25 grains A1680 110 Sierra hollow point = 2650 fps
the 110 Sierra hollow points and the 125 TNT are producing under 1" at 100 yards with A1680 out of the 20" 1:12 noveske....a full case load with the A1680 has a very low standard deviation, so far less than 15 fps...
kurtz
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