The Latest Cartridge .223/45

[donald duck]

Just saw an article that someone has opened the neck of the .223 to .257 and they call it something like .223/.45.
Do any of you know anything about it?? I have thought for a long time it could and should make a great inexpensive plinking round. Lyman makes a 65 grain mold. Bull Berry and MGM Machining make barrels for the contender. If you are familiar with this new round please email me at dworley790@gmail.com Thanks so much!! dd

[dkf]

It is called a 25-223 or .25-45 Sharps. Came about for ARs but can be chambered in other rifles. It is good option for guys in states where you can't use a .22cal.

http://srcarms.com/

[FLHTC]

It's also called the 257TCU , which was introduced in the silhouette game by Wes Ugalde and it makes a fine cast bullet hunting round. it appeared in the late 1980s. I have an MGM barrel for my Encore in 257TCU and at one hundred yards, it groups within a half inch. It was introduced before the AR became popular in the commercial market. Nothing new about it
http://en.wikipedia.org/wiki/Thompson/Center_Ugalde

[Artful]

http://gunsmithtalk.wordpress.com/tag/25-223/

http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/5586731/AR15_25_x_45_Wildcat

http://www.beyond556.com/bboard/forum/ar-variant-cartridges/medium-bore-ar/4630-25-223-remington-wildcats

[scottfire1957]

Actually the first I've heard of this cartridge, and I'm very intrigued. Very. Intrigued. I might be very interested in an upper for my AR.

[Jupiter7]

Not doing anything new. 6x45 has been around for years. But I do like the 25-45 and it seems like the most logical and pain free way to go up in caliber on a standard sized AR. I haven't seen any barrels other than the hbar barrels that SRC sells. It'd be a natural for the small rem model 7. And would be real nice in the new Ruger ranch rifle. Maybe even in the mossberg MVP that takes AR mags.

[JeffinNZ]

The new .25 Copperhead.

[leadman]

The 223 has been opened up for all bullet sizes thru 30 caliber, with and without the improved case of the TCU series. I have a 6.5TCU, and sold a 7TCU.

[Echo]

John Wooter published his 25/223 back in the 60's, IIRC. Called the 25 Copperhead, others called it Wooter's Tooter - IIRC.
And my silhouette gun was an XP-100 re-barreled to 30/223 - equal to the 30 Herret...

[Artful]

Echo - John Wooter's Copperhead is not a 223 based but a 222 based wildcat
http://www.myhostedpics.com/images/briannmilewis/2522copperhead.jpg

[Echo]

Ooops - my bad...