Please explain what this means?
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Please explain what this means?
S
South_Pender
Guest
Here's what I meant: If you have an unfired case you plan to use that is, for example, .430" in diameter at the shoulder, how much greater than that should the chamber dimension be at that point to be sure of smooth chambering and sufficient room to expand? Similarly, if the diameter of the unfired case you're planning to use mic's .4372 at a point .20" up from the base, what should the chamber diameter be at that point? .439"? .440"?Please explain what this means?
Hope it's clear now....
Last edited by a moderator:
Here's what I meant: If you have an unfired case you plan to use that is, for example, .430" in diameter at the shoulder, how much greater than that should the chamber dimension be at that point to be sure of smooth chambering and sufficient room to expand? Similarly, if the diameter of the unfired case you're planning to use mic's .4372 at a point .20" up from the base, what should the chamber diameter be at that point? .439"? .440"?
Hope it's clear now....
The dimension at .200" should be between .4395" and .440". If you get it to tight, expect a click on extraction. Also make the inside neck shoulder junction with a .060" radius, not a .075" radius. Keep headspace a 1.075" from boltface to shoulder, just like you already have it.
Michael
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S
South_Pender
Guest
Thanks to all of you for your insights and advice.
I've gone ahead and ordered the reamer from Dave Manson.
I've gone ahead and ordered the reamer from Dave Manson.