I have been having a friendly discussion with Mr. Jack Robers about what a wylde chamber is, or is for. Mr roberts is telling me that the wylde chamber has a long throat, and is made to shoot heavy bullets. First off let me say that i know Jack is a very knowledgeable man and i dont dought what he is saying to be true. However when i was looking to buy an ar i went with the rock river varmint, because it had the wylde chamber. This is what rock river tells me that a wylde chamber is-(The 223 wylde chamber was designed as a match chambering for semi auto rifles.It will accomodate both 223 and 5.56 NATO ammo. It Is relieved in the case body to aid in extraction and features a shorter throat for improved accuracy) Like i said I bought the rock river because of the short throat. I am just wondering what is the wylde chamber? Mr Robers probable has it right, as he usually does, but i can't figure out why Rock River would claim the complete opposite if it wasnt true. I am very happy with my rifle, it shoots like a house of fire. I just want to know more about the wylde chamber for my benifit. Thanks Lee