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Re: Extraction Effort . . . How Much Does it Incre

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18 February 2004, 03:56
ScottS
Re: Extraction Effort . . . How Much Does it Incre
Dan,

If your comment were true, we would not need resizing dies. Afterall, if the brass "springs" back it would not be oversized.

The truth is that the thin wall sections of your brass cartridges are stressed to 100,000+ psi during firing. Since the yield strength is around 35,000 to 65,000 psi the thin sections of the brass case are plastically deformed. Hence the need to resize your fired brass cases.

I know how much the extraction effort increases with cartridge size increases in a given action/barrel shank combination. I was interested in seeing if anyone else had something to contribute.

I don't think you will get a mauser style action to extract a 600 NE that was fired off at 50,000 psi without a SIGNIFICANT effort.

What is the receiver ring diameter, and barrel shank diameter for your Heym 600 NE?

Regards,
Scott
17 February 2004, 18:07
craigster
Aw, come on, Scott, enlighten us. Back when, when you were Axel (and still are, I'm sure) you were an engineer/rocket scientist. You ought to be able to figure it out in your head.
18 February 2004, 02:04
Mauser
TROLL EXPOSED!!! TROLL EXPOSED!!! TROLL EXPOSED!!!

craigster (3864) is ScottS



Quote:

Aw, come on, Scott, enlighten us. Back when, when you were Axel (and still are, I'm sure) you were an engineer/rocket scientist. You ought to be able to figure it out in your head.


17 February 2004, 18:41
500grains
Quote:



I am wondering if anyone knows how much the extraction effort, the force required against the bolt handle, increases as one increases the diameter and length of the cartridge, or does it increase at all?



For instance, Mauser action or derivative:

8mm mauser rebarreled to 375 H&H

375 H&H rebarreled to 416 Rigby

375 H&H rebarreled to 500 Jeffery

375 H&H rebarreled to 505 Gibbs



Lets assume, for the sake of argument, that all the cartidges are loaded to 50,000 psi.



Thanks,



The Troll





If you have quality brass, it rebounds after firing (and is not stuck in the chamber), so extraction is essentially effortless. A 600 nitro that is not stuck in the chamber is just as easy to get out as a 22 Hornet.



When you own some guns, feel free to double check what I said on this.