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Old April 3, 2012, 10:13 AM   #20
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Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
hooligan1 what caused that?
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Range report 9-12-2003
1938 turk with Addams&Bennnet 243 barrel blank
100 gr, 40 gr bulk 4895, 308 LC brass necked down to 243 first shot sticky, second shot pierced a
primer, third shot very stiff chambering, third shot case failure and
smoke in the face, bolt stuck, 20 sharp raps on the bench to open.
wrecked cleaning rod getting the case out. scope very loose. gave up

The inside of that barrel was rough as a cob.
It took 100 pounds of force at the bolt knob to close the bolt on those handloads.
That powder acts more like the H322 model in the Quickload library than IMR4895. 40 gr H322 100 gr 243 is predicted to be 82kpsi.
Maybe the first shot was 82kpsi but the last one looks morel like 110 kpsi.
Bullet pinch makes for pressure spikes.
Between 2003 and 2006 that picture was downloaded ~ 50,000 times.
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