R.W.Dale
Member
Over on AR15.com I offered to compile a bunch of data concerning how 7.62x39 preforms in diffrent bbl lengths. I figured I'd share it with you guy's first.
The rifles used for this test differed greatly from one another so please don't take this as "one size fits all" data.
The rifles used were as follows
1. A norinco 16.5" paratrooper SKS .310bore
2. is a 20" Model 1 Sales AR15 upper .310bore
3. a custom bolt gun with a 1/15 inch twist bbl that's 26" long and has a .308 bore
All chrony readings were taken at 12 feet with a model F1 without sky screens against a uniformly Grey overcast sky and an air temp of 55 degrees. Perfect chronographing weather.
Part 1 factory loads
154 grain WOLF sp
16' bbl........20" bbl........ 26" bbl
2042............2106............2273
2025............2110............2265
2015............2113............2261
2041............2125............2256
2033............2124............2250
avg velocity
2031............2115............2261
123 grn Monarch FMJ
16' bbl........20" bbl........ 26" bbl
2354............2432............2599
2345............2418............2595
2377............2405............2593
2315............2453............2548
2330............2422............2601
avg velocity
2344............2426............2587
125 grn Remington SP
16' bbl........20" bbl........ 26" bbl
2265............2261............2428
2238............2308............2444
2202............2304............2437
2191............2366............2485
2224............2264............2486
avg velocity
2224............2300............2456
Part 2 hand loads
for these loads the 26" rifle was omitted and the SKS had the gas piston removed due to slamfire and cycling concerns
170grn Sierra .308 diameter 30-30 flat point, magtech SR primer, 28.0grs H335
16' bbl........20" bbl
1921............1968
1924............1967
1931............1970
1936............1970
1896............1985
avg velocity
1921............1972
125 grn nosler b-tip, magtech SR primer, 25.5grs AA1680
16' bbl........20" bbl
2256............2359
2226............2355
2243............2361
avg velocity
2241............2358
The only real loser in all this is the anemic Remington ammo, this stuff just reinforces my assertion that anything METRIC factory loaded in this country is going to suck.
The most interesting find was just how fast and accurate these loads were when fired from as accurate platform as possible through a 26" tube
5 shot groups for the factory loads in the Stevens 200 were as follows
154grn Wolf 1.2"
123grn Monarch 1.37"
125grn Remington 1.0"
The rifles used for this test differed greatly from one another so please don't take this as "one size fits all" data.
The rifles used were as follows
1. A norinco 16.5" paratrooper SKS .310bore
2. is a 20" Model 1 Sales AR15 upper .310bore
3. a custom bolt gun with a 1/15 inch twist bbl that's 26" long and has a .308 bore
All chrony readings were taken at 12 feet with a model F1 without sky screens against a uniformly Grey overcast sky and an air temp of 55 degrees. Perfect chronographing weather.
Part 1 factory loads
154 grain WOLF sp
16' bbl........20" bbl........ 26" bbl
2042............2106............2273
2025............2110............2265
2015............2113............2261
2041............2125............2256
2033............2124............2250
avg velocity
2031............2115............2261
123 grn Monarch FMJ
16' bbl........20" bbl........ 26" bbl
2354............2432............2599
2345............2418............2595
2377............2405............2593
2315............2453............2548
2330............2422............2601
avg velocity
2344............2426............2587
125 grn Remington SP
16' bbl........20" bbl........ 26" bbl
2265............2261............2428
2238............2308............2444
2202............2304............2437
2191............2366............2485
2224............2264............2486
avg velocity
2224............2300............2456
Part 2 hand loads
for these loads the 26" rifle was omitted and the SKS had the gas piston removed due to slamfire and cycling concerns
170grn Sierra .308 diameter 30-30 flat point, magtech SR primer, 28.0grs H335
16' bbl........20" bbl
1921............1968
1924............1967
1931............1970
1936............1970
1896............1985
avg velocity
1921............1972
125 grn nosler b-tip, magtech SR primer, 25.5grs AA1680
16' bbl........20" bbl
2256............2359
2226............2355
2243............2361
avg velocity
2241............2358
The only real loser in all this is the anemic Remington ammo, this stuff just reinforces my assertion that anything METRIC factory loaded in this country is going to suck.
The most interesting find was just how fast and accurate these loads were when fired from as accurate platform as possible through a 26" tube
5 shot groups for the factory loads in the Stevens 200 were as follows
154grn Wolf 1.2"
123grn Monarch 1.37"
125grn Remington 1.0"
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