ARP 141 - The 223 Wylde Chamber


Welcome to Episode #141 of the AR15 Podcast. On this episode we’re talking about The .223 Wylde Chamber.We want to let you know about a new source of cool products! Please go to to pre-order the Huckleberry patch and buy FRN stickers.

Main Topic: .223 Wylde

Bill Wylde - AR Gunsmith

Developed in 1984

Directly competed with match chamber Reamers like:

Mike Bykowski's (High-Performance Int'l)

Frank White's (Compass Lake Engineering)

Developed for 80 grain bullets

A Post By: Bill Wylde

Date: Thursday, 13 November 2003, at 8:46 a.m.

In Response To: Re: .223 Wylde

“The case dimensions of the Wylde reamer are that of one of the NATO prints. Not a thing tight about it. As I recall, there were two NATO prints in use. I don't recall the print number used, but do have it in old records somewhere.

Throating was about the only change. The decision was made to make the freebore diameter .2240" as a good bullet seal. That done, excess freebore made little difference to accuracy. One of the reasons the magazine length 69's shot so well in the chamber. It so happened that the 80 grain Sierra seated to the lands was about ideal at .2470" OAL. Simple luck.....All of it.

The initial reamer (designed in 1984) was mainly geared toward Canadian 5.56 ball, as I was experimenting with their issue ball for competitive purposes. This operation was slow in getting off the ground, and really didn't start happening until about 1990. The use of 5.56 NATO ball in Canada was a short lived affair. Handloads were allowed in about 1994.

Just prior to this time the AR's were gaining great strength in the U.S. The military finally got involved. The rest is history.

You might ask how the the 62 grain 5.56 ball worked for Canadian LR prone shooting to 1,000 yds? It was supersonic in barrels of 28", and longer. It also was very competitive with the 147 grain 7.62 ball in use there at the time. The wind drift differential at long range (7.62/5.56) was about 15% in favor of the 7.62.

Those days were very interesting.”

Otis Technology:

August 30: David Dickerson

September 6: David Hibler

September 13: Stephen Carter

September 20: Thomas H. Jackson

The fine folks at Otis Technology have sent over a mountain of rifle maintenance tools and cleaning kits for the AR-15 and AR-10.  We’ve been tasked with giving them away.  Watch for the special posts on Facebook and Instagram to get a chance to win some of the awesome products made by Otis Technology.  We’ll give away a complete MSR Cleaning kit in either 5.56 or 7.62 in the middle of each month up until Christmas, when we’ll give away a complete Otis Technology Elite Cleaning System to one lucky listener.  During the alternating weeks, we’ll be giving away a host of Otis tools and cleaning supplies.


Jonathan: Hey guys, great podcast, I've learned a lot in my short time listening to you.  I know that now and then you guys will do a podcast on a specific caliber AR, so I was wondering if you could do one on the .223 Wylde cartridge. I couldn't find where you've done this one yet, and from what I've read, it seems like this would be a really good chambering for an good all-around AR build.

joelfrederick:  Regarding the suggestion to have a supply of 20 round magazines…  Unfortunately the state I live in is "crazy" and limits us to 15 round limit.  Although I have some higher capacity magazines, I've grown to like the 10 round mags from Magpul.  The biggest reason is in bench shooting (or for that matter, something like Appleseed), 10 rounds is about all that is needed unless you really want to or have a reason to burn through a lot of ammo.  In the case of shooting at my local range, I've found that I can rest a 10 round mag on a bag or in a pinch, my forearm where a 20 or larger mag provides an unstable pivot point requiring a bipod.