Subsonic 12 Ga. Slug Loads

In this video, Gary and Jerry test different loads of Alliant Red Dot to see which one works best for subsonic slugs. See the description for all the juicy details and specifications.

Hulls, Powder and Slugs

The hull used for both factory loads is a Cheddite 2-3/4" with a 16mm high brass base and a CX2000 primer. They are cut down to 2-3/8" to match the reduced powder charges in the subsonic loads.

Score Competition Slug 1 Oz. 2-3/4” (Orange Hull)
26.7, 26.3, 27.2, 26.6, 26.4, 26.8, 26.5, 27.0, 26.5, 26.5
Average - 26.65 grs. of Powder
441.1, 442.0, 442.4, 439.1, 437.3, 439.1, 437.8, 440.0, 439.7, 439.5
Average - 439.8 grs. Slug and Wad (51 grs.)

Score Competition Slug 1 Oz. 2-3/4” (Green Hull)
21.2, 20.9, 21.0 – Average 21.0 grs. of Powder
436.4, 438.1, 435.8 – Average 436.8 grs. Slug and Wad (51 grs.)

Chronographed Velocities

The shots below are listed in order of when they were fired, from first to last. The speed of sound is 1100 fps on a standard day at sea level static conditions. We were about 1300 feet above sea level. The temperature and humidity were 5 degrees Celsius and 95% respectively when we fired the first shots. They were at 14 degrees and 67% when we finished. The gun started off dirty, and was not cleaned between shots. The chronograph was 10 feet from the muzzle.

Score Competition Slug 1 Oz. 2-3/4” (Orange Hull, Set One)
1286, 1289, 1281 FPS -- Average 1285 FPS, Standard Deviation 5.74 FPS

7.0 grs. Subsonic Slug (Orange Hull)
340, 505, 393 – Average 412 FPS, SD 68.78 FPS

8.0 grs. Subsonic Slug (Orange Hull)
522, 516, 607 – Average 548 FPS, SD 41.55 FPS

9.0 grs. Subsonic Slug (Orange Hull)
695, 703, 741 – Average 713 FPS, SD 20.06 FPS

10.0 grs. Subsonic Slug (Orange Hull)
794, 805, 846 – Average 815 FPS, SD 22.37 FPS

11. 0 grs. Subsonic Slug (Orange Hull)
872, 881, 828 – Average 860 FPS, SD 23.15 FPS

12.0 grs. Subsonic Slug (Orange Hull)
915, 932, 940 – Average 929 FPS, SD 10.42 FPS

13.0 grs. Subsonic Slug (Orange Hull)
983, 1000, 992 – Average 991 FPS, SD 6.97 FPS

13.0 grs. Factory Powder, Half-Load (Orange Hull)
596, 569, 642 – Average 602 FPS, SD 30.13 FPS

14.0 grs. Subsonic Slug (Orange Hull)
1024, 1063, 1046 – Average 1043 FPS, SD 16.02 FPS

15.0 grs. Slug (Orange Hull)
1110, 1087, 1106 – Average 1101 FPS, SD 10.03 FPS

16.0 grs. Slug (Green Hull)
1203, 1146, 1142 – Average 1163 FPS, SD 27.86 FPS

18.0 grs. Slug (Green Hull)
1266, 1265, 1270 – Average 1267 FPS, SD 2.16 FPS

Score Competition Slug 1 Oz. 2-3/4” (Orange Hull, Set Two)
1339, 1270, 1274 – 1294 FPS, SD 31.63 FPS

Score Competition Slug 1 Oz. 2-3/4” (Green Hull)
1334, 1331, 1323 – 1329 FPS, SD 4.65 FPS

Shots on Milk Jugs
7.0 grs. Subsonic Slug – 467 FPS / 213 ft-lbs of energy
9.0 grs. Subsonic Slug – 732 FPS / 523 ft-lbs of energy
10.0 grs. Subsonic Slug – 800 FPS / 625 ft-lbs of energy
Score Competition (Orange) – 1335 FPS / 1,740 ft-lbs and 1324 FPS / 1,712 ft-lbs

The recovered slug had a mass of 434.8 grains (basically 100%) and was barely deformed. It was the only slug that passed the penetration test, as all the others blew out the top or sides of the jugs.

Видео Subsonic 12 Ga. Slug Loads канала Prairie Ballistics