The .223 Wylde Solution
I'm not completely sure when the .223 Wylde chamber design first became available but I learned about it midway through 2012. Bill Wylde of Greenup, IL came up with the solution to better accuracy that bears his name.
I've heard and seen questions asked about the .223 Wylde "caliber"... It is not a caliber it is a chamber specification that improves on the throat area dimensions.
The changes that Mr. Wylde implemented have led to a huge improvement in accuracy as well as eliminating the need to worry about shooting 5.56 out of a rifle chambered in .223. Just make sure it is not chambered .223 Remington.
I've spoken to many everyday shooters who've purchased .223 Wylde, barrels, upper assemblies and complete AR-15s that rave about achieving sub 1in grouping with their everyday firearms.
By moving to .223 Wylde you are in effect moving to "National Match" configuration.
I didn't write this article to be a technical bulletin, but for those of you interested in learning more, there are several great Wiki references about Eugene Stoner, the evolution of the .223 Remington cartridge, and the .223 Wylde.
For anyone who has ever had someone try to convince them that the .223 and the 5.56 cartridges are different sizes... you'll especially enjoy the .223 Wylde Wiki.