I had only the .387" hollow base bullets to shoot through a 0.403" bore. Impossible it seems. However I got about 6" groups at 30 yds. It was an ancient iron sighted Colt DA New Army with a 5" barrel. I ended up making "blanks" and handloading individual rounds into one chamber using .401" .40 S&W 175 gr. SWC bullets BACKWARDS to help fill the bore. I got about 4-5" groups! Shot Harry a line (knows everything about the .41 Colt) and he said "goodness boy that is fantastic shooting for the .41 LC!". So there you go.
My first handloading experience, sort of a like experience I think I share with JT, was the .38-40. But it was an old Colt New Service. I had a LEE Tap-Bang kit, some .401" bullets, and Unique powder. It shot horribly. Seems it had 0.396" throats in the cylinders and a 0.403" bore. The 0.401's got swaged to 0.396" to rattle down the 0.403" tube, gas cutting all the way. What a mess. I'll spare the details but I stopped that action and got some satisfying results in the end. Not tack driving but under the circumstances I'll take average in comparison.
Another time I shot .44-40's in my .45 Colt by accident and garnered some 4" groups at 25 yds.
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10mm Bullet Sizes...
- Huey, 2019-11-19, 18:13
- I MEASURED SPEER (.400") AND - JT, 2019-11-20, 09:54
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All the jacketed bullets I have measured are .399" +/-
- WB, 2019-11-19, 18:51
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why on earth would you want .404 bullets in a 10mm? (nm)
- gary reeder, 2019-11-19, 22:13
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I was curious about this too..
- Huey, 2019-11-20, 04:48
- The articles said bore was .404? not .400/.401 - WB, 2019-11-20, 07:32
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I was curious about this too..
- Huey, 2019-11-20, 04:48
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why on earth would you want .404 bullets in a 10mm? (nm)
- gary reeder, 2019-11-19, 22:13
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DON'T EXPAND THE .38-40 BRASS.
- JT, 2019-11-19, 18:23
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I rememebr working with the .41 Long Colt
- WB, 2019-11-19, 19:06
- the old .41 LC was a 1895 "New Navy", not Army (nm) - WB, 2019-11-19, 19:19
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I rememebr working with the .41 Long Colt
- WB, 2019-11-19, 19:06