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[argumentative/inflammatory remark(s) deleted by CW]... I thought that claypipe said he was a metallurgist.


So I guess I'll tough it through 4140 or 4130, then heat treat. Easy machining isn't anywhere as important as safety.
 

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Agreed on that. Did you bother with heat treating?

I doubt I will - just overbuild them further.... breech thickness = bore diameter, barrel thickness = 1/2 bore diameter. Out of 4140, and with reasonable loads of powder, that'll be plenty strong. Now just to get about 10 million opinions, to make sure! :D
 
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