Chambering Problems

[Sieger]

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Johnny C. Kitchens:
<strong>There is a reason for the step in the 9mm chamber. The round headspaces off of the mouth of the case. As far as a precise measurement of the magazine, no problem. I've got a set of calipers. I've got four different kinds of magazines, so here are the measurements.

My FXO - 1.069"
Swiss - 1.0695"
70's Mauser - 1.065"
Mec-Gar - 1.0625"

I measured from the middle of the back of the magazine to the middle of the curve in front, inside to inside dimensions. Interesting variations...</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Johnny:

Well then, it sounds to me like Mec-Gar has, indeed, shortened up the interior of the magazine to address the Step-feed problem with modern spec ammo!!!

Original OAL for Ball Ammo 1.175
Current American Standard 1.169
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Difference 0.006
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FXO Interior Length 1.069
Mec-Gar Interior Length 1.0625
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Difference 0.0065
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This little discovery may be very, very helpful to those experiencing the infamous OAL problem. They should now confine themselves to firing ammo that is max. spec. length, that being 1.169 inches long.

As I've said, I have two of these magazines on order and will have plenty of time to experiment with them very shortly.

THANKS A MILLION!!!

Sieger