300 AAC Blackout

This video pretty much sums it up about 300blk. 300blk in super sonic is just about completely burned at about 16". Anything longer than that would only net minimal velocity/energy gains and more weight.

http://www.youtube.com/watch?v=tgKjbySsAik

So are some of these rounds like 300 blk/whisper and .458 being designed around a 16" barrel then? I've seen a bolt gun for 300 blk that I believe was 22"(ish), but all AR platforms for all those rounds are 16" or shorter and they have huge diminishing returns on velocity after 16".

Quote:

---

Originally Posted by bellavite1

As I suspect many of us, I am intrigued at the idea of shooting a 30 cal bullet out of an AR.
I do have a few questions, however, that somebody hopefully can answer:

I do realize that a 300 BLK is not a 308, but what is the feasability of using it as a medium range cartridge (say 500yds)?

What kind of accuracy can be expected in this application?
I can tipically hold 1/3 MOA a 100 yds with my 308, sometimes out to 300 yds.

Using a medium weight bullet, say around 150gr, what kind of velocity can be expected from a 20" barrel?

Does a 20" barrel in this caliber even exist?

Yes, I know it is a round supposed to be for CQB, but it would be nice to be able to convert my 20" .556 and have a lightweight med range precision weapon...

Any imput?

---

Here is a link to some data posted by the Lead Engineer for the 300 BLK project for AAC...
http://www.300blktalk.com/forum/view...?f=128&t=78987

Quote:

---

Originally Posted by Hoser

Nope. I have no interest of shooting critters with subs. I would rather smack them with a 130gn 6.5 bullet going the speed of heat.

---

creedmore or grendel

i am intrigued by the 300 blackout but how is it really different from 7.62x39 besides mag and bolt interchangeability?

Quote:

---

Originally Posted by tmckay2

i am intrigued by the 300 blackout but how is it really different from 7.62x39 besides mag and bolt interchangeability?

---

Better ballistics past 100yds due to higher BC projectiles. Knowing you can use standard 5.56 PMAGS is a huge plus for reliable feeding. If someone wants to shoot 7.62x39, get an AK.

from anyone who loads it, how cheaply can it be reloaded? 308 projectiles generally aren't cheap but can you get it down to 0.30 cents a round?

Quote:

---

Originally Posted by tmckay2

from anyone who loads it, how cheaply can it be reloaded? 308 projectiles generally aren't cheap but can you get it down to 0.30 cents a round?

---

No...I doubt .30.... unless you cast your own bullets. 45 cents maybe for regular rounds.

I've never really tried to add it up. I know that my Barnes 110gr TAC TX projectiles alone cost me $.70 per bullet.

I'd imagine 147g bi metal could be close to $.30/rd


Sent by a free-range electronic weasel, with no sense of personal space.