ASSRA Forum - Hepburn qestion - .40-50 or .40-70?

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Hepburn qestion - .40-50 or .40-70? (Read 4945 times)

Spud Senior Forum Member Offline Posts: 494 Location: Australia Oz Joined: Feb 24^th, 2005	Hepburn qestion - .40-50 or .40-70? Mar 16^th, 2008 at 5:31am	Print Post
	My Hepburn (heavy barrel, double triggers) is marked .40 17/8 under the barrel but a chamber cast revealed a long chamber with the rifling starting approx 2.7" down the bore. A .40-70 SS case chambers easily. The barrel has the standard Remington 5 land rifling with a nominal groove dia of .408", twist is 1 in 20". The bore is in very good condition. It all looks factory original. As a test I loaded up some .40-70 SS & .40-50 SS cartridges using a Rapine .407" 300 gr slug and they both shot OK. My question is .... What have I got here? Was the .40 1 7/8 normally chambered with a a lot of freebore? Have any of you .40-50 SS owners seen this with other Remingtons. Or is it an incorrectly marked barrel? Spud


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38_Cal Frequent Elocutionist Offline Posts: 2247 Location: Montezuma, Iowa Joined: Apr 27^th, 2005	Re: Hepburn qestion - .40-50 or .40-70? Reply #1 - Mar 16^th, 2008 at 8:47am	Print Post
	It may have been "magnumized"! David Montezuma, IA

	David Kaiser Montezuma, IA
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11433 Location: Why, out West of course Joined: May 29^th, 2006	Re: Hepburn qestion - .40-50 or .40-70? Reply #2 - Mar 16^th, 2008 at 9:27am	Print Post
	Who know's ? Is the chamber the right length for a 40/70 ? I dont have the length in front of me. Joe.

	A blind squirrel runs into a tree every once in a while.
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marlinguy Ex Member Ballards may be weaker, but they sure are neater!	Re: Hepburn qestion - .40-50 or .40-70? Reply #3 - Mar 16^th, 2008 at 3:22pm	Print Post
	One of my Hepburns is in .40-70 and the marking under the barrel is,"40.2 1/2" I'd guess if your's is marked the way it is that it's been reamed out, or wrongly marked.-Vall

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leadball Ex Member	Re: Hepburn qestion - .40-50 or .40-70? Reply #4 - Mar 16^th, 2008 at 7:03pm	Print Post
	spud;The 40 1 7/8 SS is a paper patched chamber [ I think] you might make another chamber cast and look at it very carefully. Someone that really knows may chime in here. leadball


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leadball Ex Member	Re: Hepburn qestion - .40-50 or .40-70? Reply #5 - Mar 16^th, 2008 at 7:07pm	Print Post
	spud; I forgot--my friends 40 1 7/8 Hepburn is original and it has a groove Dia of .403. leadball


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Spud Senior Forum Member Offline Posts: 494 Location: Australia Oz Joined: Feb 24^th, 2005	Re: Hepburn qestion - .40-50 or .40-70? Reply #6 - Mar 18^th, 2008 at 5:38am	Print Post
	Leadball, Thanks for the comment. I did another chamber cast and it's a smooth cylinder (no sign of a recut/lengthened chamber) with a very slight taper starting at around 2.7" (from the mouth of the chamber) with the rifling starting at about 2.8 ". Following your line about the .40-50 SS being a paper patch round I checked an old guide to WRA Co. cartridges and the PP is listed there as having an overall loaded length of 2.64". If anyone else with a Rem Hepburn in .40 1 7/8 SS has made a chamber cast, I"d be interested in details of the chamber length and also the rate of twist. Thanks Spud


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Spud Senior Forum Member Offline Posts: 494 Location: Australia Oz Joined: Feb 24^th, 2005	Re: Hepburn qestion - .40-50 or .40-70? Reply #7 - Mar 18^th, 2008 at 6:50am	Print Post
	I forgot to add that I'd also be very interested in similar details of chamber casts of .40-70 SS in Rem Hepburns (for comparison). Thanks Spud


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