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John in PA
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.32-40 Rem. Hepburn
Apr 18th, 2019 at 11:05am
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I picked up a lovely Hepburn with double-sets at auction. Pristine bore. Appears to have been originally chambered for 32-1 5/8" (.32-30 Hepburn) but was rechambered to .32-40 Hepburn (definitely NOT B&M) at some point. 

I will not be shooting this rifle extensively, but wouldn't mind preparing some ammunition and giving it a try at least.  I see BACo has brass, but no cast bullets in .308-.309" diameter.

Any suggestions on where to start preparing a reasonably accurate load with minimal effort? I'd just as soon purchase some cast bullets for this one as I really don't need to add another bullet mold to the already extensive pile...  (laziness creeping in!)
  

John Wells
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marlinguy
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Ballards may be weaker,
but they sure are neater!

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Re: .32-40 Rem. Hepburn
Reply #1 - Apr 18th, 2019 at 11:16am
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Since the cartridge is so close to the .32-40 Ballard, I'd start with the same load data. I'm unsure what the twist rate is on the original barrel, but guessing it will likely be fast enough for 140-150 gr. cast bullets. Acme Bullets sells both a 135 gr. and 155 gr. cast bullet, and I'd probably buy a box of each size to see which works best in your Hepburn.

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A quick Google search shows a large number of companies selling .30 caliber cast bullets from pretty light, to up around 165 grain.

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Quarter_Bore
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Re: .32-40 Rem. Hepburn
Reply #2 - Apr 18th, 2019 at 11:20am
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I would check the groove diameter before going any further.
  
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beltfed
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Re: .32-40 Rem. Hepburn
Reply #3 - Apr 18th, 2019 at 12:19pm
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John, I have had my tight neck 32-40 Rem Hep
chambered Brg BPCR rifle for a number of years. The barrel is a 30 cal Lilja 8 twist, originally intended by Dan Theodore for Long heavy bullets over Black Powder. I do have molds for 30cal bullets up to 247 grains and have done some of that.
But, I have mainly shot it in Schuetzen matches with 200 gr bullets- it does well with  Lyman 311299 or 311334 bullets cast 9+1 COWW/Lino w/o gas check over 15.5 gr IMR 4227.
Cartridges of the World lists the twist of both of the Rem Hep "32s" at 16 and the land and groove are 300/308or309.. that suggests a bullet No More than 150 gr
and probably better with a slightly shorter one.
As I'm sure you know there are lots of 30 cal molds out there. An inexpensive Lyman mold could be a good start for you. A kind of neat light one is the 311359, a pointed 115 gr gas check bullet.
Another one slighly heavier is the 311465  if you can find one. Marlin guy's suggestion of a 135 gr from Acme may be a good start.
You can look at bullet choices and load data for 30-30 ctg, since the 32-40 Rem Hep has about the same case capacity. As QB said, be sure to do a chamber cast, and also verify the land and groove diameter and twist
Brass is best formed from available 303 British- close to the correct length. Mine is all Remington and it forms very well in my dies.
Oh, I do also have the tight neck match reamer for this ctg
beltfed/arnie
  
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John in PA
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Re: .32-40 Rem. Hepburn
Reply #4 - Apr 18th, 2019 at 3:15pm
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Thanks for the feedback. One key feature of this particular rifle is that it appears to have been originally chambered for the 32-30 cartridge (barrel marking of 32. 1 5/8  was overstamped to 32.40 5/8 I doubt this wa factory, as the font for the "40" numerals is different from the original factory markings) I have no idea whether Remington used the same twist rates and bore dimensions for the .32-30 Hepburn and .32-40 Hepburn.

As suggested, a chamber cast and slugging the bore will be definitive, together with obtaining an approximation of twist rate.
  

John Wells
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beltfed
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Re: .32-40 Rem. Hepburn
Reply #5 - Apr 18th, 2019 at 4:16pm
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John, as I had said,
BOTH the 32-30RH and the 32-40RH are listed in COW
as having:
16 twist
300/308or309 bore and groove dia.
Now that you note that the rechambering may Not have been by Remington, its more important that you do a chamber cast as well as slug the bore
beltfed/arnie
  
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beltfed
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Re: .32-40 Rem. Hepburn
Reply #6 - Apr 18th, 2019 at 4:34pm
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John,
If you like, I can send you a fire formed, and resized piece of 32-40 Rem Hep brass. Send me your mailing address
via a PM
beltfed/arnie
  
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John in PA
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Re: .32-40 Rem. Hepburn
Reply #7 - Apr 18th, 2019 at 4:39pm
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Chamber cast in the works. BTW, BACo has essentially no stock (3 cases) on .32-40 RH.  What's the best parent case to form these? I think I've got some .405 Win in inventory.
  

John Wells
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John in PA
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Re: .32-40 Rem. Hepburn
Reply #8 - Apr 18th, 2019 at 4:40pm
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Missed your last. Thanks much!! I'd like to take you up on that. PM coming.
  

John Wells
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oughtsix
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Re: .32-40 Rem. Hepburn
Reply #9 - Apr 18th, 2019 at 5:49pm
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Hi John,   ! have one of each,  a .32-30 (.314 dia)  and .32-40 Rem. (.314dia) .  I used 303 British brass to resize for the .32-40R and I bought some from Roberson Cartridge Co.   For both cases I had to full length resize by putting  flat piece of metal on top of the shell holder and running the FL die all the way to the rim to squeeze that last few thousandths.  That's just a fyi if you want to make your own.  If you will pm  your mailing address,  I'll send you a a piece or two of brass and some bullets to try out. 

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Re: .32-40 Rem. Hepburn
Reply #10 - Apr 18th, 2019 at 8:38pm
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ought six,
Interestingly, my Rem Hep 32. W.C.F. has a 0.314 groove diameter
beltfed/arnie
  
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