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Search took 0.00 seconds. Search: Posts Made By: rsilvers
Forum: 300 Whisper Rifles and Pistols 01-26-2011, 06:14 PM
Replies: 29
Views: 6,347
Posted By rsilvers
http://img156.imageshack.us/img156/7178/p1050155b....

http://img156.imageshack.us/img156/7178/p1050155b.jpg
Forum: 300 Whisper Rifles and Pistols 01-20-2011, 10:31 PM
Replies: 29
Views: 6,347
Posted By rsilvers
MV = velocity in fps

MV = velocity in fps
Forum: 300 Whisper Rifles and Pistols 01-20-2011, 11:15 AM
Replies: 29
Views: 6,347
Posted By rsilvers
Stability is a function of RPM. Bullet RPM =...

Stability is a function of RPM.

Bullet RPM = MV X 720/Twist Rate (in inches).

So the faster the bullet goes, the better.

Run the Miller stability calculation and see if the value is high...
Forum: 300 Whisper Rifles and Pistols 01-17-2011, 10:07 AM
Replies: 29
Views: 6,347
Posted By rsilvers
There is probably far more variation in 308 dies...

There is probably far more variation in 308 dies from brand X to brand Y than there is between 300 AAC BLACKOUT and the 300-221 drawing I saw.
Forum: 300 Whisper Rifles and Pistols 01-16-2011, 05:18 PM
Replies: 29
Views: 6,347
Posted By rsilvers
I don't have an SSK drawing, but I saw a CIP 300...

I don't have an SSK drawing, but I saw a CIP 300 Whisper(R) drawing (well after BLACKOUT was submitted) and there seemed to be at most a 0.0004 difference in headspace - which is metric->imperial...
Forum: 300 Whisper Rifles and Pistols 01-16-2011, 04:46 PM
Replies: 29
Views: 6,347
Posted By rsilvers
What will a Whisper(R) die change about 300 AAC...

What will a Whisper(R) die change about 300 AAC BLACKOUT brass?
Forum: 300 Whisper Rifles and Pistols 01-12-2011, 12:43 AM
Replies: 29
Views: 6,347
Posted By rsilvers
About the same but was submitted to SAAMI as a...

About the same but was submitted to SAAMI as a standard. The velocity is a bit higher due to longer freebore - like 5.56mm compared to 223.
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