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Forum: 300 Whisper Rifles and Pistols 12-01-2011, 02:53 PM
Replies: 26
Views: 3,754
Posted By rsilvers
By the way - the BC for the 125 grain is Sierra's...

By the way - the BC for the 125 grain is Sierra's value for the target velocity range of 300 BLK. We got 0.320 on radar. For a ballistic program, I would personally use 0.320.
Forum: 300 Whisper Rifles and Pistols 12-01-2011, 02:52 PM
Replies: 26
Views: 3,754
Posted By rsilvers
First, at the subsonic speed, a BC based on a...

First, at the subsonic speed, a BC based on a sphere was the most accurate (lowest error). G1 was second. Then I think it was G8. And G7 was dead last.

The G1 BC would change if I used 800-1000...
Forum: 300 Whisper Rifles and Pistols 12-01-2011, 10:26 AM
Replies: 26
Views: 3,754
Posted By rsilvers
We had the 220 SMK radar tested and the G1 BC was...

We had the 220 SMK radar tested and the G1 BC was 0.720. So the 240 should be even higher. Sierra has never tested it at subsonic speeds which is why their number is lower.
Forum: 300 Whisper Rifles and Pistols 11-30-2011, 11:03 PM
Replies: 26
Views: 3,754
Posted By rsilvers
Lapua (16.5 inch barrel): ...

Lapua (16.5 inch barrel):

http://www.midwayusa.com/product/481507/lapua-ammunition-762x39-russian-123-grain-full-metal-jacket-box-of-30
...
Forum: 300 Whisper Rifles and Pistols 11-30-2011, 08:42 PM
Replies: 26
Views: 3,754
Posted By rsilvers
The reality is, 7.62x39mm - at least in surplus...

The reality is, 7.62x39mm - at least in surplus or steel cased form, is cheaper. So a lot of people are going to put up with it because it is buyable for 17 cents a round as Yugo surplus.

And then...
Forum: 300 Whisper Rifles and Pistols 11-29-2011, 09:34 PM
Replies: 26
Views: 3,754
Posted By rsilvers
There would be less of a difference at 100 yards....

There would be less of a difference at 100 yards. The 300 meter advantage was because of the more efficient BC of the 300 BLK bullet. Basically the 300 BLK starts out as less, and ends up as more and...
Forum: 300 Whisper Rifles and Pistols 11-29-2011, 09:31 PM
Replies: 26
Views: 3,754
Posted By rsilvers
Yes, I made videos of my 7.62x39mm AR working...

Yes, I made videos of my 7.62x39mm AR working also.
Forum: 300 Whisper Rifles and Pistols 11-29-2011, 08:42 PM
Replies: 26
Views: 3,754
Posted By rsilvers
I have a Special Weapons lower which accepts AK...

I have a Special Weapons lower which accepts AK mags. It solved the ability to take AK mags, but raised other issues:

1. You have to mill the bottom of the carrier to let the mag feed lips clear....
Forum: 300 Whisper Rifles and Pistols 11-29-2011, 06:03 PM
Replies: 26
Views: 3,754
Posted By rsilvers
It is impossible to fix. The AR magwell is...

It is impossible to fix. The AR magwell is straight. You can curve the mag all you want below the magwell, but you can never make the round go through the straight section properly. The mags were...
Forum: 300 Whisper Rifles and Pistols 11-29-2011, 06:01 PM
Replies: 26
Views: 3,754
Posted By rsilvers
300 AAC BLACKOUT, with Remington factory 125...

300 AAC BLACKOUT, with Remington factory 125 grain Match ammo, is 16.7% MORE energy than Lapua 7.62x39mm ammo - when measured at 300 meters. I picked Lapua for the comparison because it is the only...
Forum: 300 Whisper Rifles and Pistols 11-27-2011, 11:21 PM
Replies: 26
Views: 3,754
Posted By rsilvers
Gunblast article

http://www.gunblast.com/300Blackout.htm
Showing results 1 to 11 of 11

 
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