Quoted: I've been reading more about 300 fireball due to this thread; so all I have to do is swap my barrel and I can shoot this stuff? It works in AR 223 mags, drums? What sizing die to use to make 223 into 300? |
It is an interesting round... if you have a need for it, there is really only one other round* I can think of that is even in the same park. Some things to know before you jump in though:
It is not a "factory" round, you are pretty much going to end up reloading if you own one.
There are really two different things here, the 300 Whisper was developed by JD Jones, other people use a round that is *really, really* close to the 300 Whisper (300/223), but the neck dimensions and case thickness in the neck area are different -- you HAVE to know what your chamber is to get the most from this cartridge -- and know what your brass is made from, necked up 221FB or cut down 223/5.56mm.
It is kind of a fussy round when it comes to reloading...
You need to get a barrel... and you need to have the gun setup by some one that knows the cartridge, cutting the feed ramps and making things work -- plan on a short gas system and an adjustable manifold, this gives you the most versatility.
Mags are regular AR15 5.56mm mags... but most guys do a little work to the front of the mag, to get better feeding, it does not effect the mag and it works fine with 5.56 still.
*338 Specter -- Marty is the man behind this.