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In all fairness, Cor-bon has 2 357 sig loads, the 125 gr at 1425 and 115 gr at 1500. There is basically no diff btwn, the 125 grain loads at 1425/1450. However, the 9x23 case can withstand higher pressures than the 357 sig, ~49000 psi v. 40000 psi (if I am not mistaken) and therefore can be loaded hotter.


<font size=-1>[ This Message was edited by: jasonwbayou on 2001-08-27 12:58 ]</font>

On 2001-06-16 22:05, David DiFabio wrote:
Here is a post with my 9x23 and .357Sig data:
The 9x23 is able to achieve very good performance in the factory loading using the Winchester silvertip round. This is in direct relation to the design of the 9x23 including velocities and energies. If we were to use a standard 9mm silvertip bullet, the round will under penetrate and fragment very quickly as the Winchester Silvertip 115gr 9mm +P+ bullet of days past averaged only 8” of penetration.
I have some fairly limited 9x23 tests but I have spent a fair number of hours testing the .357Sig from a 5" barrel 1911 and the factory .357 Sig velocities are within 5 - 50fps less than the 9x23 factory loadings.
In the 147gr XTP JHP the .357 Sig was a "deep" penetrator averaging 19" of gelatin penetration, I found that at higher velocities the .147gr Hornandy XTP loads did not expand to a larger diameter, they averaged .54-.58 expansion and penetrated to a longer depth. The same loading penetrated 15" from the shorter barrel of the Sig 229 and expanded to .55". I then switched to the excellent Speer Gold Dot 125gr JHP bullet, this load averaged 1,380fps from the P229 and 1,435fps from the 1911. From the Sig P229 the GD expanded to .67" and penetrated to 17". From the 1911 (w/Ed Brown barrel) the GD expanded to .68" and penetrated to 15".
The Winchester 125gr Ranger Talon (RA357SIGT) averaged 1,385fps from the Sig P229; it penetrated to 12" and expanded to .74".
The same loading from the 5" 1911 averaged 1,445fps, it penetrated to 11.5" and expanded to .76", it became very flat nosed.
It should be noted that all three rounds performed very well and not one of the bullets failed/fragmented.

I also tested the Corbon 115gr and 125gr load; they were very poor performers in my opinion as all loadings failed/fragmented from the Sig P229 and completely fragmented from the 1911.
The Corbon 115gr loading averaged 1505fps from the Sig P229, it penetrated (core) to 9” and completely failed/fragmented, the core measured .43”.
From the 5” 1911 it averaged 1,540fps, penetrated to 7.5” (core) and completely failed/fragmented, the core measured a smaller diameter of .41”, I suspect due to higher fragmentation.
The Corbon 125gr loading averaged 1,420fps, penetrated to 13” (core) failed/fragmented measured .40” from the Sig P229.
From the 1911 it averaged 1,460fps, penetrated to 11.5” (core) failed/fragmented, and measured .39”.
*Note: These appear to be the same Sierra JHP bullets Corbon uses in the .9mm loads.

My results may or may not equate to similar 9x23 results but it is fairly easy to see the patterns.


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I understand about the 9x23 and I have one at Dane's getting some work done on it but because of the ballistics being close and the availible ammo wouldn't the .357 sig. in a 1911 be a better carry/plinking gun?
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