The .30-30 case is about maxed out with the 10mm. Your chamber ciphering looks very reasonable. Almost straight but just a couple thousandths of taper. The chamber reamer shows 0.420 at the case base and a .30-30 case is only 0.418 measured there. Chamber tapering to 0.418 at the case mouth end. That allows for the mouth to expand out about straight wall for the .30-30 case upon firing and still be easily extracted.
I just plucked up a mix of old brass that did not seem to work well due to wall thickness at the case mouth. This is the fun part. I'll keep you posted on the next phase of play. I just have not gotten to it yet.
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WB, how is the 400 Gnr project coming along? (nm)
- Derek, 2020-02-13, 18:23
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Been having to actually work, not used to it.
- WB, 2020-02-13, 18:53
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Looking forward to the full report. Good to know
- Derek, 2020-02-13, 19:13
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Rumor is I made him crazy and he quit
- WB, 2020-02-13, 19:44
- I could see that--your boss i mean:) (nm) - Lynn, 2020-02-14, 08:51
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As I mentioned before, if you think the barrel has a
- gary reeder, 2020-02-13, 22:17
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I think the barrel is fine. My brass is thick.
- WB, 2020-02-13, 22:51
- when I designed the 400 GNR I set the specs for a .010 - Gary Reeder, 2020-02-14, 10:58
- I was making my brass too long too. Needs to be - WB, 2020-02-13, 23:27
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I think the barrel is fine. My brass is thick.
- WB, 2020-02-13, 22:51
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Rumor is I made him crazy and he quit
- WB, 2020-02-13, 19:44
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Looking forward to the full report. Good to know
- Derek, 2020-02-13, 19:13
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Been having to actually work, not used to it.
- WB, 2020-02-13, 18:53