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dont bother. if you want more velocity go to a .22-250 or down to a .204, the .204 will easily top 4 grand with 40 gr bullets, and the 40 grain .204 bullets have higher B.C.'s. you are doing something with this cartrige that it wasnt intended to do, this means more wear and tear, and a potentially unsafe situation. at a very MINIMUM have your chamber Akley Improved.

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Benchmark is slow, you will never get there.

N133 with a thick cup primer in Lapua brass is the key...accuracy is astounding to say the least.

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I wanted to add this comment, there is a world of difference between a factory chamber and a custom Minimum SAAMI Match chamber with minimum throat and freebore. Even 40x Chambers are huge as a general rule of thumb.

We have seen super velocities and accuracies cut from Minimum spec chambers in Varmint and big game caliber, even when Stainless factory barrels were re-chambered when new.

Shooting the 40's at 4000 is no big deal, but it does take specific things to accomplish it, minimum chamber, little longer barrel length, tough brass such as IMI or Lapua, N133, and tough cup primer, 1-14 twist barrel.

4200 out of the 223 AI with the same data above again is no big deal.

N133 is magic in speed in conjunction with extreme accuracy, usually 150 fps faster than benchmark.

These stats are usually contemplated by a guy that is considering converting to a 204 when he already has all the "stuff" for a 223.

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Yeah.Yeah.


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Originally Posted by 35_PBBK
dont bother. if you want more velocity go to a .22-250 or down to a .204, the .204 will easily top 4 grand with 40 gr bullets


Really? I think VV list one load at or near 4k with a 39/40gr pill, and that is the exception.


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Originally Posted by keith
Benchmark is slow, you will never get there.

N133 with a thick cup primer in Lapua brass is the key...accuracy is astounding to say the least.
confused

I'd rather run a 22-250; even get risky with a 225 Winny or 22 Zipper/Wasp.

What, by chance, is a "thick cup primer"? IME its a Rem. 7.5 or mil-spec CCI. Benchmark is too slow?

The AI 223 and 222 Mag will run close enough without magic primers, powder, cases and custom chambers for the latter. Better yet, magical pressure limits are not really needed either. Benchmark and slower fuel at above SAAMI spec is too slow? eek

Running 4,200 from a 223 begs for a larger case, and they're out there.

Am waiting to see recommended loads for 50 grainers at 3,850 from the std. 223 case now...the 22-250 is obsolete.

Last edited by HawkI; 09/05/09.
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so my .223 beats the nieghbors .220 wow is my .223 faster than my hunting budies .22-250 AI? who'da thunk? You know what I think there's lots dreams in this world and dreamers not a few.


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From a standard 223 you will be hard pressed to do this SAFELY. With H335 and a 40gr bt with a 26" tube I did get 4040 fps from my 223 Ackley.

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There are alternatives..... smile

Just built a 22/204 AI/223 AI Long/222 Mag AI specifically to shoot 80 gr AMax's. 3100 with 80 gr bullets is right at the edge of pressure. Believe 40's would go a touch over 4K.


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Originally Posted by acloco
There are alternatives..... smile

Just built a 22/204 AI/223 AI Long/222 Mag AI specifically to shoot 80 gr AMax's. 3100 with 80 gr bullets is right at the edge of pressure. Believe 40's would go a touch over 4K.



And I'd be very interested in your findings once you get it running.....Hopefully the 222 Mag AI?

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Originally Posted by Iraklion
From a standard 223 you will be hard pressed to do this SAFELY. With H335 and a 40gr bt with a 26" tube I did get 4040 fps from my 223 Ackley.


I can believe that a I run 40's at 3900+ out of a 22" 223AI.
Having run the 223AI to both primer piercing and once case separating pressures I have no illusions that my pressures are not close to the edge nor the velocities many other post.


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Yup that sounds about right


"You gotta accomplish something every day. When you go to bed at night ask yourself what you did today, there better be something on the list" Robin Carlson
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