Has anyone ever wildcatted with a .223 necked up to .243" or .257"? What kind of velocities could be achieved?

Might be a cool project on a mini-Mauser action?

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Originally posted by John Frazer:
Has anyone ever wildcatted with a .223 necked up to .243" or .257"? What kind of velocities could be achieved?

Might be a cool project on a mini-Mauser action?

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John, the 6mm is known as a 6x45, there is the 7mmT.C.U. I haven't seen a 25 but sure it's been done, the 222mag. was shot alot in benchguns as a 6mm 6x47 and was top dog in BR untill the PPC case came along,both have been custom chambered in some of the small run type semi custom guns, Cooper-Kimber ect. they would be fun and cheap to load,good luck andgood shooting!!!

bigdaddytacp,
The .25 cal. was called the "Copperhead" as developed by John Wooters around 1968-69 on the .222 Rem. case. Wolfe Publishing has a giant book called "Wildcat Cartridges" where this article is written.
Bill

Thanks for confirming my suspicion that there are precious few cartridges left to invent. <g>

John

Accuracy Rifle System, which make accurize Ruger Mini-14, has offered 6mm-223 winchester chambered bull barrel for several years.

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I seldom wander over this way but glad I did today...

I have shot the 6x45 (6mm-223) for quite a few years, built on a Sako L-461 round top action...I use two powders H322 and H335..
For deer I use 28.t grs. H335 for 3096 in my 20" barrel....My accuracy load is 25 grs. of H322 and a 60 gr. Sierra HP or 55 gr. Nosler Bal. tip, at about 3100 fps.

Accuracy? have NEVER shot a group over .500 and most are in the 2's and 3's..Not bad for a 5 lb. gun....

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Ray Atkinson

ray@atkinsonhunting.com
atkinsonhunting.com

Here is a 6x45mm, aka the 6/223. This is a Hornady 100 grain RN, the brass is headstamped 6x45. I like to push the 100 grainers around 2350. 70 grainers can go over 3000, but the ballistics on a comparable .224 bullet weight are better, the B.C. is much higher. The 6/223 gives you more short range versatility, bullet weight wise, and a heavier punch.

[This message has been edited by David M (edited 08-18-2001).]