Super-Sonic Loads

03/26/04

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NEW: 300 Whisper Forums!

After considerable frustration on my part, I have finally managed to get a new forum up and running. The forum includes two areas, one for area for 300 Whisper rifles and pistols and a second for reloading and ammo issues. I have a huge number of visitors that come to these pages each day so please drop in the forum and say "Hi" and share your projects!

Note: The material on this page was provided by J.D. Jones
of SSK Industries and he has given permission for it's use.

Click HERE to go to SSK Industries

300 WHISPER DATA (Super-sonic)

(.221 REMINGTON FIRE BALL PARENT CASE)

REM. 7-1/2 PRIMER, 16.5-INCH BARREL, 70° F

Powder Charge Grains

Powder

Average FPS/FPE

Extreme Spread Notes

125-Grain Nosler Ballistic Tip (Temperature 60-65F)

20.6

Hodgdon 110

2333/1511

20 Bolt Gun (BG)

20.6

Hodgdon 110

2283/1447

64 AR-15

22.0

Hodgdon 110

2438/1650

31 BG

150-Grain Bullet (Temperature 60-65F)

18.8

AA No. 2015 BR

1615/869

29

18.9

Reloader 7

1834/1121

54

20.2

AA No. 1680

1994/1325

40

18.0

Hodgdon 110

2073/1432

13 Bal Tip

18.0

Hodgdon 110

2014/1351

29 AR-15

168-Grain Bullet (Temperature 60-65F)

18.8

AA No. 2015 BR

1672/1043

28

18.9

Reloader 7

1823/1240

19

20.2

AA No. 1680

1906/1356

12

17.2

Hodgdon 110

1958/1431

27

190-Grain Bullet (Temperature 60-65F)

17.7

AA No. 2015 BR

1564/1032

18

17.9

AA No. 1680

1754/1298

34

15.4

Hodgdon 110

1725/1256

40

220-Grain Bullet (Temperature 60-65F)

15.6

AA No. 2015 BR

1429/998

25 w/out slow shot

15.4

Reloader 7

1485/1078

47

15.6

AA No. 1680

1467/1052

64 BG

15.6

AA No. 1680

1492/1088

11 AR-15

12.5

Hodgdon 110

1412/974

47

9.1

Hodgdon 110

1070/559

49

250-Grain Bullet (Temperature 60-65F)

12.0

AA No. 2015 BR

1101/673

42

12.1

Reloader 7

1211/814

44

13.9

AA No. 1680

1304/900

38

14.6

AA No. 1680

1377/1011

36 AR-15 (240 gr.)

12.0

Hodgdon 110

1376/1009

46 (240 gr.)

Note: 250 grain bullets are no longer in production. The 240 Sierra Matchking replaces it. Two decimal charge weights were obtained using an electronic scale by averaging ten dropped charges.

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This page was last updated 03/07/06