In the early days, sometimes the diameter of the barrels were measured from the top of the lands, not the grooves. The .44 cap n ball pistols used .456" - .457" balls ... the caliber was measured across the tops of the lands.
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Cripes, ever win a bid you thought you had no chance?
- WB, 2026-03-10, 10:34
![[*]](themes/default/images/complete_thread.png "Open whole thread")
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Anyone stumble on the reason the .38-40 named so? It’s a .40 (nm)
- WB, 2026-03-10, 11:02
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Maybe 40-40 sounded too weird? (nm)
- Jim Taylor, 2026-03-10, 11:42
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Did it have 38 grs. of black powder?
- WB, 2026-03-10, 12:44
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Far as I know it was 40 gr. black powder...
- Jim Taylor, 2026-03-10, 15:36
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Last .38-40 I actually slugged mic’d 0.403”
- WB, 2026-03-10, 16:38
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I put in the first bid on a S&W model 657- no dash
- james, 2026-03-10, 16:54
- Wow. Nice gun. (nm) - Jim Taylor, 2026-03-10, 18:01
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I put in the first bid on a S&W model 657- no dash
- james, 2026-03-10, 16:54
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Last .38-40 I actually slugged mic’d 0.403”
- WB, 2026-03-10, 16:38
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Far as I know it was 40 gr. black powder...
- Jim Taylor, 2026-03-10, 15:36
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Did it have 38 grs. of black powder?
- WB, 2026-03-10, 12:44
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Maybe 40-40 sounded too weird? (nm)
- Jim Taylor, 2026-03-10, 11:42
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Anyone stumble on the reason the .38-40 named so? It’s a .40 (nm)
- WB, 2026-03-10, 11:02