408 Chey-Tac Imp

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Mayhem338, Jun 17, 2012.

  1. Mayhem338

    Mayhem338 Well-Known Member

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    After reading a lot of the info available on the various 408 based calibers, I have noticed no attempts at just improving the 408 itself. Is this mainly due to not much in the way of bullet selection? Is all the bad press that Chey-Tac brought on itself a real factor as well? With the real velocity gains that have been seen in 338 and 375, I would thing a 408 400gr at 3100 with a BC in the .9-.93 range might be impressive. Any thoughts?
     
  2. redneckclimbing

    redneckclimbing Well-Known Member

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    Mayhem- I have wondered the same thing, as far as imporving the .408. I was also windering if anine has ever tried to improve the .408 and neck it down to .338. There are some .338's I found with a 1.4?? or so BC that only weigh 309 grains what would those do out of an improved .408 case as you were saying?!
     

  3. dirtball

    dirtball Well-Known Member

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    Several
    338 Allen Mag
    Allen Magnum Wildcats

    338-408 Big-Baer
    Heavy Artillery — Russo Reveals the .338-408 'Big Baer' « Daily Bulletin

    338 Snipe Tac
    338 SnipeTac

    All variations on the 408 case with suttle differences in total body taper and shoulder angle, all with one purpose in mind, burn MORE powder MORE efficiently!
    And push heavier, high BC bullets faster and flatter.

    Dave
     
  4. redneckclimbing

    redneckclimbing Well-Known Member

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    I was just about to say that, that is a .338 Allen Magnum, after I looked around a little more.

    Does anyone have any load data with some of the lathe turned solid bullets out there?
     
  5. Joel Russo

    Joel Russo Official LRH Sponsor

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    Load data would be similiar to the standard match bullets. Of course, with the heavy lathe turned bullets, you have have a sharper twist barrel...but I have still been close to my data with the standard twist barrel and the match bullet.
     
  6. Augustus

    Augustus Well-Known Member

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    Redneck climbing, there are no 338 bullets with a 1.4 BC. I reakon you may have seen something put out by GS customs. if you think there is an ounce of truth to this nonsense, I invite you to obtain a few of these and fire them then come bank and give us a range report.
     
  7. redneckclimbing

    redneckclimbing Well-Known Member

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    You're right, they were from GS customs and the advertised B.C. was 1.2 something (don't remember off the top of my head). Anyways, do these not live up to the hype? Also, how do they do through the transonic range (transitioning from super to sub sonic)? Anyone know for sure?
     
    Last edited: Jun 26, 2012
  8. Augustus

    Augustus Well-Known Member

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    I don't know anyone that has tested the 309. There has been two tests that I know of that tested a 300 gr. One test was with an 8.5 twist and the other was with a 5.5 twist. The bullets hit the ground out of both barrels.
     
  9. sp6x6

    sp6x6 Well-Known Member

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    Top shot posted in the ELR forum a 416 that is currently built that pushes a 450 gr. g7 .43 @ 3100.Sound like a new contender
     
  10. Mayhem338

    Mayhem338 Well-Known Member

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    The 416 Barrett will do that as well just with a hot load. The brass for the Barrett is not that great, weight consistency is horrid and needs a bunch of prep time. I had started this topic to see if anyone had given it much thought. Making an improved 408 would be very easy just load and shoot.
     
  11. s5traut

    s5traut Active Member

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    Why does the the 408 CheyTac need to be improved?

    Maybe I'm misunderstanding, but what exactly is wrong with the 408 CheyTac to start with? I've seen it shoot well under one moa at a mile while retaining more energy than a 50 BMG. Unless you are just trying to make a good round better, why does the the 408 Cheytac need fixing?
     
  12. sp6x6

    sp6x6 Well-Known Member

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    THIS is a new design with bench rest quality,they say brass,made I think in SA, and a McMILLAN rifle.Check out post on ELR SECTION
     
  13. Topshot

    Topshot Well-Known Member

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    I shot the .408CT in a Barker Machine Works rifle. Now against the 416 McMillan the difference was in the portability of the two systems.

    The .408 came with a 28" rifle in a single shot configuration on an XLR stock. This rifle could be packed into some remote hunting areas if you wanted to. The .416 McMillan system on the other hand is what I would call a truck rifle! Bloody great ballistics but I would not like to cart it very far in the bush.

    Now the thought of improving the standard .408 is interesting but due to the bore size to case capacity, I dont think you would gain much velocity in a 28" barrel? I could be wrong.
     
  14. Mayhem338

    Mayhem338 Well-Known Member

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    S5

    There is nothing really wrong with the standard 408 CT. I was thinking if you are loading it anyway why not get the most out of it.