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Durkin Tactical Franklin Armory
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Posted: 1/20/2008 7:55:10 PM EST
Your cases look like this


this is a varient btw
A .243 belted magnum
Who says bolts aren't strong
Thats what happens when you use 42gr of H4895 behind a 95gr SMK and shove it .020 into the lands. The 42gr was a mischarge and should have been 39gr.
 Edited to explain how this happened.
To charge a 243 you have to use the small tube to feed the powder into the case.
When using slow burning powders sometimes the powder will hang in the charge tube dropping less in one case and more in the next. You always visually inspect the levels but when the charge is down below the shoulder it's hard to tell the difference in a few grains. Quickload figured this charge from the velocity reading to be around 78000psi.
17000 psi over the SAAMI spec.
cmmg
Link Posted: 1/21/2008 1:22:20 AM EST
[#1]
So did ya get a velocity..lol... ?
Link Posted: 1/21/2008 4:57:27 AM EST
[#2]
3284
Link Posted: 1/21/2008 4:57:58 AM EST
[#3]
Yeh really, what was the velocity?  4500fps?  HAHA!!!  Glad everything held up ok on the gun...

Link Posted: 1/21/2008 6:04:36 AM EST
[#4]
Well I hope nothing was broken, and no injuries, that would be most important.
Link Posted: 1/21/2008 7:11:08 AM EST
[#5]
you just aren't happy unless yoiur are finding out what it takes to break something are you?

Tim
Link Posted: 1/21/2008 8:02:21 AM EST
[#6]

Quoted:
Well I hope nothing was broken, and no injuries, that would be most important.


Not even a puff of smoke or a hard recoil, the case did not seperate. It does make me think about drilling a gas relief port throught the side of the extension and upper receiver like  Mauser or Remington has.
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