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Advisory Panel
That is the best evidence I have ever seen that a case will not necessarily seperate because the headspace is a couple of thousandths of an inch above some gauge value. In this case, it's several millimeters above gauge value. Why did the cartridge fire at all - because it was held back by the extractor.
This photo should be required "reading" for all those who make newbies nervous by claiming that firing a tough old service rifle like an M1917 is dangerous if the headspace is a gnat's whisker too large.
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09-10-2012 06:31 PM
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Advisory Panel
Agreed. As long as the explosion is contained, directed forward, all will be sfae. Just hard on the resizing of brass. 
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I think one clue may be had by observing the blown out shoulder of the .223 case in Post #7. Minus bulging of the midsection the 30-06 case looks about the same. A 45-70 chamber might could keep the mid section swelling to a minimum. How off center was the primer indentation?
Last edited by jmoore; 09-10-2012 at 11:15 PM.
Reason: Specified ref. post
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Legacy Member
The case is on my desk at work and I will look at it in the AM. I am a bit doubtful of the 300 RUM as the body and shoulder are a gnats whisker from a normal 30-06 case. The RUM body is more like 0.500 with a rebated rim and this case body is not blown out.
wineman
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Originally Posted by
Skip
During brass police call I also found a strange spent case. A 5.56 fired in a 7.62X39 chamber.
Two guys who I used to work with, who were both in the Army, swore that they AK was "designed" to fire a 5.56 round. One guy was croation and of course had a "thing" for the AK. I told him that was bunk and asked them if they ever tried. To which of course was A "no". But they both claimed the Army was the place that "trained" them to believe this.
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