lharrell79
Member
- Joined
- Oct 13, 2011
- Messages
- 27
Is one better than the other for cutting and sizing your own 300 Blackout cases? Is one case able to handle higher pressures?
Before you start this, you need to look at page 93 of the latest American Rifleman. The cartridge, whether labeled Whisper or Blackout, is based on opening up the neck of the .221 Fireball, which is going to end up thinning the walls of the case neck. Cutting down a .223 to length then necking it down is going end up with thicker neck walls, which could get you in trouble with finished cartridges that won't chamber, if you are lucky. If you are not lucky, the rounds may chamber but the oversize neck will run the pressures way up (see the comments on chambers and throat dimensions in the rest of this article).Is one better than the other for cutting and sizing your own 300 Blackout cases? Is one case able to handle higher pressures?
I think the savings in using .223 or 5.56 brass are going to be offset by needing to neck-turn every converted case to get the correct neck dimensions. Of course, it's your gun, so you can take your chances...
IMHO
Don't know what the source was for what you read; the Rifleman article quotes the people that designed the cartridges. Who you going to believe?I read that the 300 Blackout was designed to use a cutdown 223 and had allowances for the thicker neck.
I am a master typist, my Kindle fire goes out of its way to make me look bad.
Do you have a link to the article?