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Extreme Long Range Hunting & Shooting (ELR) Over 1,000 Yds.


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375 DCM, 375/408imp

 
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  #8  
Old 10-11-2012, 12:55 PM
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Location: New Mexico
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Re: 375 DCM, 375/408imp

Called and talked to Bartlien,they are not making the .375 gain twist barrel(not enough demand)

Last edited by paul2atlo8; 10-11-2012 at 12:58 PM. Reason: speling
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  #9  
Old 10-11-2012, 02:06 PM
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Location: Nelson, New Zealand
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Re: 375 DCM, 375/408imp

Quote:
Originally Posted by royinidaho View Post
Greg,

Thanks for the answers.

'nother question:

I know nothing about those bullets but seem to gather that they are 'bore riders' with seating dependent upon the "ring".

My rig is single shot. Except for extracting a loaded round, can I load and use those things?

Oh! 'nother question: Mine is a 10 twist. Will at least the 375 grain offering work?
They should work fine in a single shot, they are long

I would try some 350s & 375s to see which you & your rifle prefer
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  #10  
Old 03-13-2015, 03:23 AM
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Join Date: Nov 2012
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Re: 375 DCM, 375/408imp

Hi, I have quite a few questions I'd like to ask you because my next gun will be an ultra long range rifle, probably a lot like yours. I already have a long range scope, a US Optics 5-25x 58 mm, I believe it's called the 5-25ER, and I like the XLR Chassis. Like you, I am looking to shoot something hotter than a standard 375 Cheytac and I like the ballistics you posted with the 425 CE bullets at 3100 fps and consistent velocities with the Hodgdon 50 BMG powder. I am trying to find someone in the US who chambers or will build a 375DCM or 375/408 Cheytac Improved. I assume they are the same cartridge? There is a 375 Viersco Magnum which is even higher velocities with the same weight bullet, but more concussion wave and shorter barrel life come with it, so I'd rather stick with what you got. Any idea on how far you could punch a hole in an engine block with that posted load? 1,000 plus yards I guess? :-)
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  #11  
Old 03-13-2015, 09:03 AM
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Re: 375 DCM, 375/408imp

Quote:
Originally Posted by Lovetohunt View Post
I am looking to shoot something hotter than a standard 375 Cheytac... I am trying to find someone in the US who chambers or will build a 375DCM or 375/408 Cheytac Improved. I assume they are the same cartridge? There is a 375 Viersco Magnum which is even higher velocities with the same weight bullet, but more concussion wave and shorter barrel life come with it, so I'd rather stick with what you got.
Lovetohunt,

IIRC Dave and Kirby developed their 375 extreme magnum offerings at the same time but independently. Both came up with very nearly identical cartridges.

Both are 375/408 CT Improved but there must be different levels of improvement.

I shoot 350 SMKs @ 3250 w/142.5 grains of Retumbo out of a 30" 10 twist PacNor barrel. (Its the builders recommended load - which I've backed off a grain and a half just on general principles......)

I'm not sure that all that velocity is necessary for taking game. However, to reach out to very ELR ranges ya need all ya can get.

I doubt that, when shot sensibly, a persons life time isn't long enough to wear any of them out. Especially if ya start at my age.

Your problems will be brass and barrel twist, I'm think'n.

There seems to be a significant relationship between reamers and case manufacturers. If a reamer is designed based on one brand of brass and another brand is used there's gonna be a problem somewhere down the road.

Concussion, now that's an experience. Especially for bystanders.
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  #12  
Old 03-13-2015, 01:35 PM
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Re: 375 DCM, 375/408imp

Hi Roy, any idea then on what reamer/brass brand to use on a 375/408 imp? Or rather, which reamers go with which brand of brass?
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  #13  
Old 03-13-2015, 02:01 PM
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Location: Nelson, New Zealand
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Re: 375 DCM, 375/408imp

The 375 Snipetac by Dave Veirs or Kirby Allens 375 AM are very similar to the 375 DCM.

Dies & a reamer will be easier to get hold of.

The barrel brand, length & twist have a major influence on performance.

I prefer to use the fast twists to shoot the 425-450 CEB projectiles.

Others prefer the slower twists & lighter projectiles.

The heavy projectiles aren't cheap but their performance is incredible at ELR

I haven't shot engine blocks, but IIRC a mate was putting holes in plates at 1000 recently, with 425s out of this rifle, apparently they were hardened.

The 425 at 3100fps+ has an amazing amount of energy concentrated into a very small area with its SD.
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  #14  
Old 03-13-2015, 03:49 PM
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Join Date: Nov 2012
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Re: 375 DCM, 375/408imp

Hi Greg,

Thanks for the reply. Dave Viersco told me the 375 Snipetac shoots a 375 grain bullet at 3150 fps. I'd like to shoot the 425 grain CE's because of that incredibly high SD, and I'd like to shoot them at 3100+ fps. 32 and 34 inch barrels seem to be popular, and I hear of some people using 38 inch barrels. Do you prefer a gain twist for the 425's, or straight twist, and what twist rates do you think work the best for the bigger pills??
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