Right. I had this question as well, and found that I could not find dies in 5.56. Everything available is .223. I've found that brass from 5.56 in my limited sample of range pickups tend to be longer than trim length for .223 spec. Since my book says to trim it, I will when I get around to that brass.BobCat wrote:No problem - I'm not even sure you can buy dies marked 5.56 mm, I think they all say .223 Rem.
Do you have a trimmer? Forster, RCBS, Lee, and others make trimmers; ideally you want to trim the sized cases to 1.750" (do not believe numbers from the net, look it up in your manual). I think the main difference in .223 and 5.56 is in the throat. Cases at the trim-to length will be least likely to be tight in the throat and inhibit the bullet leaving (leading to high pressure). The history and so forth of the .223 and 5.56 are at http://ammo.ar15.com/ammo/" onclick="window.open(this.href);return false; .
Have fun!
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Return to “military crimped brass”
- Fri Nov 12, 2010 7:55 pm
- Forum: Reloading Forum
- Topic: military crimped brass
- Replies: 7
- Views: 1866