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Old June 14, 2012, 05:50 AM   #2
Mobuck
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Join Date: February 2, 2010
Posts: 6,846
The amount of "pressure" has no effect or bearing on the material from which the lower is made except that the billet lowers must be sufficiently hard surfaced after milling to resist deforming at the pinholes/threads. This is a general statement and other factors are not dealt with.
No comments on the other questions.
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