Rick Richard
Well-Known Member
I do love Defiance actions, but have a Kelbly action on my 300 NMI. I like it.
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Help me pick an action to build off of
- Thread starter Rifleman97
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- actions build thread
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Chamberman
Well-Known Member
The coned bolt face helps to accommodate the coned breech face.
Mikecr
Well-Known Member
This is really about breech support.
The bigger tenon puts more barrel steel around the chamber.
A coned breech extends breech support.
Larger cartridges require larger area of chamber, so it's appropriate to increase chamber support for this.
Otherwise the chamber expands more (due to it's area), causing more brass yielding (upsizing), potentially leading to difficult extraction and opening primer pockets.
That's neither gorilla, nor Hollywood. It's for real.
The bigger tenon puts more barrel steel around the chamber.
A coned breech extends breech support.
Larger cartridges require larger area of chamber, so it's appropriate to increase chamber support for this.
Otherwise the chamber expands more (due to it's area), causing more brass yielding (upsizing), potentially leading to difficult extraction and opening primer pockets.
That's neither gorilla, nor Hollywood. It's for real.
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