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Babydriver
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32-40 changing bullet weight
Nov 18th, 2025 at 11:44am
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I’ve been shooting 32-40 in a Remington Hepburn 200 meters with a 160 gr bullet over 13 1/2 gr of 4759. Very good.  Now I want to try a 180 gr bullet. How much of a charge change would you suggest?
Thanks
  
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gnoahhh
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Re: 32-40 changing bullet weight
Reply #1 - Nov 18th, 2025 at 1:57pm
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That happens to be my favorite charge when shooting 185 Hudsons with 4759, in a couple .32-40's.

As much as I like using 4759 I'll admit to having shifted to finer grained powders for ease in metering.
  
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JHand
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Re: 32-40 changing bullet weight
Reply #2 - Nov 18th, 2025 at 2:51pm
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I used right about 14gr with my 180. I tried it with 4227, ramshot enforcer, h110, and settled on 14.1gr 300mp. The h110bwas a close second.  The enforcer gave great accuracy,  but collapsed the cases after a few firings
  
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rgchristensen
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Re: 32-40 changing bullet weight
Reply #3 - Nov 18th, 2025 at 6:03pm
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JHand wrote on Nov 18th, 2025 at 2:51pm:
I used right about 14gr with my 180. I tried it with 4227, ramshot enforcer, h110, and settled on 14.1gr 300mp. The h110bwas a close second.  The enforcer gave great accuracy,  but collapsed the cases after a few firings



The case collapsing is owing to the bullet being ahead of a contained charge, causing reflected gasses to collapse the case mouth.    This phenomenon has been known for over 100 years, and is easily prevented with proper loading.

CHRIS
  
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JHand
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Re: 32-40 changing bullet weight
Reply #4 - Nov 18th, 2025 at 7:06pm
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rgchristensen wrote on Nov 18th, 2025 at 6:03pm:
JHand wrote on Nov 18th, 2025 at 2:51pm:
I used right about 14gr with my 180. I tried it with 4227, ramshot enforcer, h110, and settled on 14.1gr 300mp. The h110bwas a close second.  The enforcer gave great accuracy,  but collapsed the cases after a few firings



The case collapsing is owing to the bullet being ahead of a contained charge, causing reflected gasses to collapse the case mouth.    This phenomenon has been known for over 100 years, and is easily prevented with proper loading.

CHRIS


Makes sense to me, but enforcer is the only powder that had that issue. I found another thread on here regarding the same powder in a 32-40, and on that one the poster came to the conclusion that enforcer is great, but better suited to smaller/shorter cases. I came to the same conclusion.  If loading fixed ammo, I think it would be a great choice 
  
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Old Soldier
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Re: 32-40 changing bullet weight
Reply #5 - Nov 22nd, 2025 at 11:48pm
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What do you mean by "easily prevented with proper loading"? I'm about to try breach seating and don't want to screw it up.
  
"White man have very strong Medicine. Shoot today maybeso kill you tomorrow." Esa-Tai Commanche warrior
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calledflyer
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Re: 32-40 changing bullet weight
Reply #6 - yesterday at 10:01am
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I have always thought that using powders that ignite readily, not building slowly to pressure, kept cases tight against the chamber walls. One of the reasons I always was leery of the heavily coated ball powders. I may be wrong, but adequate loads of 4227 or similar saved me the misery of wrinkled case mouths. And a tiny flare on the case to keep it snug even prevents smoky necks. Just my two cents.
  
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