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Hey,

In my tortured sleep I am dreaming of the ultimate north american lever gun.  Powerful, flat shooting, a cast delight.   Where is the 375 beartooth?  I honestly have thought about this design almost daily since I have read these posts.  I know, I gotta get a life.

Jim B
 

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I am glad someone else is looking at this.
I am thinking the total water capacity is about 60.0 grains of water.
With a bullet seated to the bottem of the neck this would leave about 44.3 grains of water.
With bullet seated to .375 deep, you have about 49.9 grains of water.

this meanswith a 380 grain bullet and 40.0 gr of IMR 4064 you should get about 1,850 fps. at about 46,800 PSI.

With a 400 grain bullet I was thinking you could get 1,850 fps with 42.5 grains of IMR 4064. this at about 49,350 PSI.

I was thinking about a 24" barrel.

This cartridge should also be interesting with Black powder and paper patch bullets.

What do you think is the best bullet weight?
 

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Slim,

If I was a bettin' man I would think that the 270 - 330 grainers would be hard to beat.  They will probably penetrate like nobodies business, and be powerful enough for anything in the continental US, maybe even the great North. The 375-348 AI is a big bear stopper, and this should not be far behind it, if at all.

I am daydreaming of one on a Marlin action... guess I'll have to a place to hunt critters bigger than whitails!

Blessing, Jim B
 

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Hey Guys,

Some where in the archives of this site is an article or posting about the .375 Beartooth including measured drawings and some baseline suggestions for load development.  The Beartooth Boys have done all the preliminaries, what's left is to chamber a rifle and tune in your loads.

Lobo in NM
 

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Yep, the work's been done, but the rifle still calls me!  Perhaps when we get caught up a little, and there's time for more liesure activities (such as rifle building and wildcatting) I'll get that .375 Beartooth built up on a Marlin action... right now I'm thinking stainless... time will tell.  As for my rifle, it's going to have a 22" tube and a 3/4 length magazine tube, topped by a set of Ashley sights.  This cartridge was designed and wrapped around a 250-275 grain gas-checked bullet both for efficiency and in neck length in regard to throat lenth and available action length considerations.  Only shooting will tell the tale!

God Bless,

Marshall
 

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Hi Marshall,

Good to see you posting here again!

Re: the 375 Beartooth, I did a full forum search and only found 2 mentions of these keywords.  One was this thread and the other one was just a teaser about this cartridge.  I think it was James Gates who posted it and it said something about this round being based on a 30-06 case???  Doesn't sound like a cartridge for (Marlin) leverguns, which I think you are alluding to in your post here.  Could you give us more info about this?  Does anyone know where to find the original posts on this?  I remember reading them earlier this year.

And I have to ask this:  Just where is this 275 gr 375 caliber bullet going to come from :)))).   Are we (the 375 junkies) going to get our lusted for WFN maybe?
 

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Marshall:

What case is the proposed .375 Beartooth going to be on?  If it is the .45-70 it's already been done.  Dave Corbin (Corbin bullets) wrote ua a .38-56 Winchester Improved he ahd done back in 1963-4,  Can't remember for sure but it was either an 1886 Win or 1895 Marlin (that didn't take too much thought, did it).  I was going to school at Trinidad CO with his brother Richard (RCECo) at the time.
 

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Gentlemen,

The cartridge is based on a .458x2" case originally, but since have altered plans and will employ the .350 Remington Mag case for a basis, but the dimensions will remain unchanged. (the neck thickness is better suited using the .350 Rem brass).

Here's the link, with the case drawings and other pertinent specifications.

<a href="http://beartoothbullets.com/cgi-bin/ikonboard/topic.cgi?forum=15&topic=11" target='_blank'>http://beartoothbullets.com/cgi-bin....opic=11</a>

I think this will be a real performer once put into the field!

God Bless,

Marshall
 

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To be honest I have no experience wildcatting so probably don't have much constructive to say about this choice of parent case, but isn't there another case with similar qualities that isn't obsolete.  I don't know of any popular cartridges that are based on the 350 Rem Mag.  The 348 Win at least has hardcore 500 Linebaugh fans to keep it alive not to mention the dyed-in-the-wool 348 shooters that hang around here.  How about basing on a common case with simple forming requirements, a la JDJones?  Maybe use a 45/70 case or something.  I don't know how original this wildcat has to be but there are changes that can make it different (shoulder angle, neck length, etc).  It was mentioned by Alk8944 that the 45/70 version of this caliber has been done before.  Was that with cast or jacketed bullets?  Your's would be a cast bullet cartridge I'm sure, perhaps providing a differentiation on that point.

Don't get me wrong here...I'm not being critical to be a jerk.  I'm just interested in the practicality.  Besides, one of these days I'll be interested (as in "afford") in building a 375 SLG (SuperLeverGun) and want to be sure that cases are readily available.

Hope you get a chance to get started on this project soon. I'm extremely interested in seeing the results.
 

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Bart, now that Marlin makes the 450, any of the magnums based on the 375 H+H case will work with no work needed on the bolt face of the Marlin, it's just that the 350 is short and there is not alot of  trimming needed! The 450 marlin brass would work also but the belt is wider on it and I talked to James Gates on the subject and he felt that it would be best to use the brass with the standard belt as brass is more common and if the 450 doesn't take off brass could get scarce! I went with the 450 brass on my wildcat and figure I will take the chance and hope the 450 has a long life! Plus I plan on buying about a thousand peices of brass!
 

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Bart, now that Marlin makes the 450, any of the magnums based on the 375 H+H case will work with no work needed on the bolt face of the Marlin, it's just that the 350 is short and there is not alot of  trimming needed! The 450 marlin brass would work also but the belt is wider on it and I talked to James Gates on the subject and he felt that it would be best to use the brass with the standard belt as brass is more common and if the 450 doesn't take off brass could get scarce! I went with the 450 brass on my wildcat and figure I will take the chance and hope the 450 has a long life! Plus I plan on buying about a thousand peices of brass!
 

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There continues to be some confusion on the .375 Beartooth. Maybe this post will clear up some of it.
The revised case is made on the .350 Rem Mag. Any .375 H&H case will work, however to gain a little case capacity and require less neck reaming, the .350 Rem case was recommended. It should be undestood that this wildcat was tailored to fit the big Marlin .450 action. The length of the case was designed for cast BTB's, with the shoulder moved back to cover all the lube grooves!This gave less case capacity than some people wanted, but due to the ovarall length needed for the Marlin, we still have to live with it. There are many wildcats out there, but this one is designed anound BTB's and the Marlin .450 action. There has to be no modifacation at all to the action.
The posted loading data was designed around IMR powders and their avg .86 density to water. The loads were based on the working pressure most believe is suitable for the Marlin action. For the brave at heart. there is plenty of case capacity to up the pressures with high density Ball powders.
 
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