Quote:
Originally Posted by Mike Poindexter
Were the old chamber inserts designed for lower pressure black powder rifle cartridges?
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In a word, yes. But one must remember that gas seal and firing pin clearance are the critical culprits here. Inserts do not offer an effective seal against gas flowing backward. And firing pin/standing breach clearance in these old doubles is generous. Result:
High pressure gas flows backward and around the insert, into the firing pin hole and lock recess, then blows out a chunk of 100-year-old black walnut.
Oops.
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