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   rec.crafts.metalworking      Metal working and metallurgy      215,319 messages   

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   Message 213,593 of 215,319   
   Jim Wilkins to Bob La Londe   
   Re: How long would it take you to 3D pri   
   25 Jul 24 21:13:27   
   
   From: muratlanne@gmail.com   
      
   "Snag"  wrote in message news:v7uoqs$2gft7$2@dont-email.me...   
      
   On 7/25/2024 6:41 PM, Bob La Londe wrote:   
   > On 7/25/2024 3:14 PM, Jim Wilkins wrote:   
   >> "Bob La Londe"  wrote in message news:v7uhei$2f4on$1@dont-email.me...   
   >>   
   >> In this case I was mostly just playing.  I have some real parts I'd like   
   >> to inject with ABS, but I don't think I have enough machine for it.  I   
   >> have considered I might set the whole machine in one of the presses, and   
   >> push directly on the piston rod.  20 tons ought to do it doncha think.   
   >> Bob La Londe   
   >>   
   >> -------------------------   
   >>   
   >> According to John Taylor 20 tons is the chamber pressure of a .577   
   >> elephant rifle which can solve any problem it's applied to.   
   >> (Cordite's pressure increases in African heat.)   
   >> However that solution is said to kill at one end and maim at the other.   
   >   
   > Ah, one of those older lower pressure rounds.  Lots of modern cartridges   
   > run around 50,000-55,000 PSI.   
   >   
      
      With that much surface area on the base of the bullet you don't need   
   a lot of pressure .   
   --   
   Snag   
   ---------------------------   
   He didn't give a number for the pressure of hot cordite but suggested the   
   pressure (measured at the English factory) had been lowered to cure   
   difficult extraction from double rifles in very hot climates. He wrote that   
   American powders weren't affected as much by heat and could be loaded to   
   higher pressure without causing extraction issues, presumably from talking   
   with rifle-savvy US clients. Apparently reloading was unknown to British   
   hunters.   
      
   "It is an astonishing thing how little the average man in Africa knows about   
   the rifles he uses--it is but a very small exaggeration to say that all he   
   really does know is that the bullet comes out of that end which has a hole   
   in it! America is the home of rifle shooting, and there is no doubt that   
   Americans are very much more "rifle-minded" than the British.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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