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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
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300 WHISPER®
DATA (Sub-sonic)
(.221 REMINGTON FIRE BALL PARENT CASE)
REM. 7-1/2 PRIMER, 16.5-INCH BARREL, 70 °
F |
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Powder Charge Grains
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Bullet Grains
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Average FPS/FPE |
Extreme Spread (Velocity)
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Standard Deviation
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Notes |
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ACCURATE ARMS No. 5 POWDER |
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7.54 |
220 |
1045/534 |
24 |
9 |
|
|
7.96 |
250 |
1044/605 |
43 |
17 |
|
|
ACCURATE ARMS No. 7 POWDER |
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10.45 |
220 |
976/465 |
38 |
19 |
|
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10.82 |
220 |
1055/544 |
49 |
17 |
|
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11.00 |
220 |
1071/560 |
48 |
19 |
|
|
10.45 |
250 |
1012/569 |
73 |
28 |
|
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ACCURATE ARMS No. 1680 POWDER |
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10.30 |
220 |
1023/511 |
33 |
15 |
|
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10.30 |
250 |
1013/570 |
44 |
20 |
|
|
11.40 |
250 |
1147/731 |
13 |
4 |
|
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ACCURATE ARMS No. 2015 POWDER |
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12.64 |
165 |
1046/401 |
63 |
35 |
|
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12.00 |
200 |
1007/450 |
20 |
10 |
|
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12.36 |
220 |
1073/563 |
27 |
10 |
|
|
12.00 |
220 |
1046/535 |
30 |
11 |
|
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ACCURATE ARMS No. 9 POWDER |
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8.08 |
165 |
1033/391 |
52 |
23 |
|
|
8.54 |
220 |
1013/501 |
71 |
27 |
|
|
8.78 |
220 |
1071/560 |
28 |
14 |
|
|
8.78 |
250 |
1040/601 |
36 |
12 |
|
|
8.54 |
250 |
1005/561 |
25 |
11 |
|
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HODGDON H110 POWDER |
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9.10 |
220 |
1061/500 |
39 |
15 |
|
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8.65 |
220 |
1003/492 |
84 |
13 |
|
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8.90 |
220 |
1012/500 |
27 |
- |
|
|
9.10 |
220 |
1061/550 |
37 |
17 |
|
|
8.60 |
250 |
980/533 |
15 |
6 |
|
|
8.90 |
250 |
1052/615 |
41 |
15 |
|
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HERCULES 2400 POWDER |
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8.26 |
168 |
1103/454 |
30 |
11 |
|
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7.90 |
168 |
1068/426 |
30 |
12 |
|
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8.26 |
190 |
1062/476 |
21 |
8 |
|
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8.58 |
250 |
1040/601 |
50 |
18 |
|
|
8.26 |
250 |
994/549 |
60 |
22 |
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HODGDON H4227 POWDER |
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9.20 |
220 |
1006/495 |
89 |
33 |
|
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9.20 |
250 |
1011/568 |
89 |
24 |
|
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9.30 |
250 |
1039/599 |
116 |
44 |
|
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9.40 |
250 |
1027/586 |
135 |
35 |
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HODGDON H335 POWDER |
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13.86 |
220 |
1031/519 |
54 |
20 |
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Note: 250 grain bullets are no longer
in production. The 240 Sierra Match king replaces it. Two decimal charge
weights were obtained using an electronic scale by averaging ten dropped
charges. |
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Important Notes from JD Jones
himself:
I would appreciate it if you would delete the Accurate #2 data and say
that in SSK AR-15 and M-16 no powder faster burning than Accurate #9 should
be used. The gas system is timed for sub sonic with powders with burning
rates from #9 through 1680.
Dies from SSK take the 221 from 22 to 30 in one pass for complete
forming. When a neck goes up in diameter the neck wall gets thinner--not
thicker. Shortening 223 and necking to 30 may give the thick neck problem.
Since Redding had ZERO contact with us about this cartridge and dimensions
of the Counterfeiters aren't correct we hear from some individuals having
problems--read again the military brass problem. SSK usually has properly
made military 300 Whisper brass at far cheaper prices that you can make it
if you value your time at all. |
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