Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login

Site Notices
Posted: 9/28/2011 8:39:00 AM EST
Are these all the same cartridge? I have a 300 fireball barrel, and am wondering if I can use 300 BLK brass.
Link Posted: 9/28/2011 11:45:00 AM EST
From wiki
"other manufacturers tend to use different names for the same cartridge, such as ".300 warrior carbine", ".300 Fireball" or ".300-221", both based on the .221 Fireball parent case."
Link Posted: 9/28/2011 12:58:27 PM EST
The wisper is a slightly larger case then blackout and won't chamber correctly unless it's a loose chamber. Or the other way around, I forget which is longer but it's like .223 vs 5.56 nato, basiclly the same thing with a different name. My only guess about the minor case length differenece is so blackout mfg's can sell blackout ammo and not lose business to wisper ammo.

The fireball, I don't know.
Link Posted: 9/28/2011 2:56:41 PM EST
I have a Model 1 300 Fireball upper, a 300 Whisper bolt gun, and a 300 Blackout upper. I use Redding 300/221 dies. I full length resize. I trim my brass to be 1.35"-1.36". I make my brass from military 5.56 cases. I do no inside or outside neck reaming. I use the same formed and sized brass interchangeably in all my 300 Whatever uppers/guns with NO problems. Note: my 300 Whisper has a tighter throat than the AR uppers, so max loads in the AR uppers can cause high pressure signs in my 300 Whisper rifle. I have also bought some formed "300 Blackout brass" off of EE and use it in all with no problems.

I don't think you will any problems using 300 Blackout brass at all.
Link Posted: 9/28/2011 6:02:02 PM EST
Beware using 300 BLK brass formed from 556 brass in a 300 Whisper or 300 Fireball chamber. The original 300 Whisper used 221 Fireball brass necked up in steps which significantly thinned the neck. When 5.56 brass is sized down to 300 BLK so the brass may be thicker. This can result in a kaboom due to too tight of a chamber.

Most folks now recommend finding a smith with a 300 BLK reamer and get your old, wildcat chamber cut to the new SAAMI specs and not having to worry about this compatibility issue.
Link Posted: 9/29/2011 3:28:49 AM EST
Thanks everyone!
Link Posted: 9/29/2011 10:54:42 PM EST
Originally Posted By agBQ08:
Beware using 300 BLK brass formed from 556 brass in a 300 Whisper or 300 Fireball chamber. The original 300 Whisper used 221 Fireball brass necked up in steps which significantly thinned the neck. When 5.56 brass is sized down to 300 BLK so the brass may be thicker. This can result in a kaboom due to too tight of a chamber.

Most folks now recommend finding a smith with a 300 BLK reamer and get your old, wildcat chamber cut to the new SAAMI specs and not having to worry about this compatibility issue.


+1

This is the best way to go as you do run a small risk of pinching the bullet in the chamber when using 300 BLK brass in a 221 fireball barrel. With a SAAMI Spec 300 BLK chamber you can get anywhere from 50 to 100 fps more from the blackout cartridge. You can buy all the factory ammo available for the blackout and not have to worry about any problems from the ammo.
Link Posted: 9/30/2011 4:33:21 AM EST
Originally Posted By Recoil737:
Originally Posted By agBQ08:
Beware using 300 BLK brass formed from 556 brass in a 300 Whisper or 300 Fireball chamber. The original 300 Whisper used 221 Fireball brass necked up in steps which significantly thinned the neck. When 5.56 brass is sized down to 300 BLK so the brass may be thicker. This can result in a kaboom due to too tight of a chamber.

Most folks now recommend finding a smith with a 300 BLK reamer and get your old, wildcat chamber cut to the new SAAMI specs and not having to worry about this compatibility issue.


+1

This is the best way to go as you do run a small risk of pinching the bullet in the chamber when using 300 BLK brass in a 221 fireball barrel. With a SAAMI Spec 300 BLK chamber you can get anywhere from 50 to 100 fps more from the blackout cartridge. You can buy all the factory ammo available for the blackout and not have to worry about any problems from the ammo.


With only having to change out the barrel, I am most likely going to just order me a 300 BLK barrel, and put the 300 whisper barrel in the parts pile. Thanks again!
Link Posted: 9/30/2011 3:28:06 PM EST
Originally Posted By Electronrider:
Originally Posted By Recoil737:
Originally Posted By agBQ08:
Beware using 300 BLK brass formed from 556 brass in a 300 Whisper or 300 Fireball chamber. The original 300 Whisper used 221 Fireball brass necked up in steps which significantly thinned the neck. When 5.56 brass is sized down to 300 BLK so the brass may be thicker. This can result in a kaboom due to too tight of a chamber.

Most folks now recommend finding a smith with a 300 BLK reamer and get your old, wildcat chamber cut to the new SAAMI specs and not having to worry about this compatibility issue.


+1

This is the best way to go as you do run a small risk of pinching the bullet in the chamber when using 300 BLK brass in a 221 fireball barrel. With a SAAMI Spec 300 BLK chamber you can get anywhere from 50 to 100 fps more from the blackout cartridge. You can buy all the factory ammo available for the blackout and not have to worry about any problems from the ammo.


With only having to change out the barrel, I am most likely going to just order me a 300 BLK barrel, and put the 300 whisper barrel in the parts pile. Thanks again!


Can't go wrong with that but don't toss the barrel if it works good I believe that most shops will only charge around $50 bucks to ream the barrel to 300 BLK.
Top Top