300BlkTalk

Is there any difference between the current 30-221/300fireballs out there? I was wondering if we were looking at a .17machIV .17 Fireball thing. More importantly can I use reasonably priced factory ammo in my 30-221. That would be sweet.

What really interests me is the new short 762SD can. It will be perfect for any 7.62x39 gun!

details on this caliber? Same/very similar chamber dimensions to 30/221? Just making an AAC/remington standard without having to pay royalties?

Schulze wrote:What really interests me is the new short 762SD can. It will be perfect for any 7.62x39 gun!

Yes, the 762-SDN-6 Is cool... that is for sure.

CKOD wrote:details on this caliber? Same/very similar chamber dimensions to 30/221? Just making an AAC/remington standard without having to pay royalties?

+1000

Any specs on the ammo?

300 Whisper(R) can do the same thing. The problem is that I would say most load data for 300 Whisper is not very compatible with the AR15 for various reasons:

1. OAL too long.
2. Bullet won't feed well in an AR.
3. Powders inappropriate for the AR gas system.

So much 300 Whisper load data is for Thompson Center and bolt guns only.

So it was better to start fresh. While I cannot say it is compatible because it is certainly not with a military standard of reliability with all of the random old loads out there, it was not designed to be incompatible either.

Remington 300 AAC BLACKOUT ammo is specifically designed to solve the reliability problems that people have had with 300 Whisper in the past. It was submitted to SAAMI and other ammo companies will be able to make ammo also, royalty-free. Likewise, many gun companies will be announcing 300 AAC BLACKOUT guns between now and the Shot Show.

Reloading dies are available from Forster.

To play the devil's advocate.....
After reading the Military Times article, I must say I'm impressed with the time and effort that went into this project.
I think this was all very well thought out and don't see any issues with the platform, except for one. (probably a non-issue.)

What happens if a magazine of standard M855 is loaded into the weapon while wearing the 300 Blackout upper?
Will M855 drop further into the chamber and keep the firing pin from contacting the primer?

Without seeing the cartridge dimensions, I can't make a guess.

tmix wrote:To play the devil's advocate.....
After reading the Military Times article, I must say I'm impressed with the time and effort that went into this project.
I think this was all very well thought out and don't see any issues with the platform, except for one. (probably a non-issue.)

What happens if a magazine of standard M855 is loaded into the weapon while wearing the 300 Blackout upper?
Will M855 drop further into the chamber and keep the firing pin from contacting the primer?

Without seeing the cartridge dimensions, I can't make a guess.

Round will not chamber