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Sam Cade · October 9, 2005, 05:37 PM

"If true, then its seems it would still only damage the extractor if the case was harder than the extractor"

Shaggy: Think of it this way.
Say it requires 20ft/lbs of force to extract a 5.56 our of your carbine using brass case ammo.
Now say it takes 30ft/lbs of force to extract steel case ammo.

Your extractor is only built to take 20ft/lbs so every time your weapon cycles you over-stress that part.

The Youngs Modulus of the case rim isnt an issue as all it has to do is hold the extractor and not get ripped off.

October 9, 2005, 05:37 PM	#33
Sam Cade Member Join Date: August 25, 2005 Location: on the banks of the mighty Cumberland Posts: 40	"If true, then its seems it would still only damage the extractor if the case was harder than the extractor" Shaggy: Think of it this way. Say it requires 20ft/lbs of force to extract a 5.56 our of your carbine using brass case ammo. Now say it takes 30ft/lbs of force to extract steel case ammo. Your extractor is only built to take 20ft/lbs so every time your weapon cycles you over-stress that part. The Youngs Modulus of the case rim isnt an issue as all it has to do is hold the extractor and not get ripped off.