.375 or 38-55
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  1. #1
    Wrangler
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    .375 or 38-55

    Thinking of reboring one of my Marlin 336's.
    But which caliber and why?
    Team 38-55 Captian
    Team 45/70 Member #1931
    Team 336 Member #249

    Failure is not an Option

  2. #2
    Gun Wizard
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    When I bought my Marlin 375 new it was because they were not making a .38-55 at that time. The .375 has worked out fine and I don't have to worry about long brass. short brass or any of those things. When I bought the rifle i bought two hundred of the 220 grain jacketed bullets, a Lyman mould , a .377 bullet sizing die and a set of R.C.B.S. reloading dies. That along with plenty of new*brass plus a Williams site have kept me shooting all these years. Whatever you decide, be smart and stock up on supplies so you can keep shooting.I think that the .375 Marlin must have been made a little stronger because the Winchester 94 Big Bore was made with added metal at the back of the receiver.

  3. #3
    Marlin Marksman
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    JES can rebore it to accept both, or either one.
    Big, flatnose bullets eliminate tracking.

    NRA Benefactor Life Member

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  5. #4
    Wrangler
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    You are Team 38-55 Captain and you ask this question?

    Slightly different focuses for the two choices...? You hunting Grizzly bears or want to shoot a sweet shooting mild mannered rifle? I guess you could always download a 375 to play.

    All in fun and posted tongue in cheek.... LOL

    My "Real" answer.....

    20190713_181542-X3.jpg
    Last edited by 1Merlin; 07-20-2019 at 07:53 AM.
    I like it. I love it. Can't get enough of it.

    Lever Action Silhouette Rifle - You get more clang for your bang with lever action silhouette.....



  6. #5
    Wrangler
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    I have a jes rebore. It will chamber, shoot, or eject .375 or short 38-55 with a .380 Lee boolit in it. Starline brass. It will not chamber the long 2.125 starline brass. It is stamped 38-55 on the barrel.

  7. #6
    Distinguished Master
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    I have a Marlin 375 win that has a .378 dia bore and so far I have not been happy with the performance using 200 g and 220 gr jacketed bullets. I have used 1680, 4198 and RL-7. I would like to rebarrel with a 22 inch barrel but can't make up my mind as to whether I want a 375 Win or a 38-55. I just want to be able to know where it is going to hit when I pull the trigger. I know that cast boolits are a option but I do not want to use cast boolits but may have to if I do not rebarrel. Does Jess rebarrel?
    gunscrewguy and 1Merlin like this.

  8. #7
    Tinhorn
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    Quote Originally Posted by horseshoe View Post
    I have a Marlin 375 win that has a .378 dia bore and so far I have not been happy with the performance using 200 g and 220 gr jacketed bullets. I have used 1680, 4198 and RL-7. I would like to rebarrel with a 22 inch barrel but can't make up my mind as to whether I want a 375 Win or a 38-55. I just want to be able to know where it is going to hit when I pull the trigger. I know that cast boolits are a option but I do not want to use cast boolits but may have to if I do not rebarrel. Does Jess rebarrel?
    Just a quick note....most (if not all) 375s have a 1/14 twist...have you tried 250 grain bullets?? My Marlins (one CB in 38/55 and one JES in 38/55) both shoot 250 grain cast bullets great....now, having said that JES re bores come with 1/15 twist, unless you spec. something else...The CB came with 1/18 and I specified the JES rebore to also be 1/18 W/3 groove rifling...it shoots great...You need to try heavier (read that as longer) bullets in your 375 before you change anything...my $.02 worth...Shrps74

  9. #8
    Wrangler
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    Horseshoe,
    You may want to look up Les Volmer for a larger bullet for your .375. He makes a very nice bullet in different weights and diameters. He answers e-mail promptly. His bullets are jacketed. He also has a web site. ( Volmer Bullets ) I use his bullets in .38-55 and .375. I'm lucky as my .375 will shoot the 200gr Sierra very good also.
    Have a great day.
    Jim
    Big Al1, Arkie, Travlin and 4 others like this.

  10. #9
    Gun Wizard
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    Tough question. I have both in original configurations. I wouldn't get rid of either one.
    Arkie, Travlin, horseshoe and 3 others like this.
    JM "Jenuine Marlin"

  11. #10
    Gun Wizard
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    I have a new made 38-55 Marlin CB and feel that it is likely what I would prefer. 375 Brass is not easy nor inexpensive. As other stated, the JES rebore takes both and I believe is done at 376 so it can use the J bullets. If one wants a rifle using large heavy bullets, the 38-55 in a 336 action will perform. I guess the 375 cases are made for higher pressure.

    If one is in a state where straight cases are allowed in shotgun zones the 38-55/375 is a great choice. It has much better down range authority than a 44 mag and can be loaded to the same muzzle velocity. Like the 44 mag it also shines with cast bullets, which explains the current popularity. Even the 375's see a lot of cast. In the rifle area I hunt in, if I wanted to improve on the 38-55 I would use my 35 Remington, which I generally do, or if I were into the power thing, I would consider the 356 Winchester or some such cartridge. The 38's are popular, but for practical use with jacketed only, a 356 in a marlin is a better cartridge, which I believe JES can also provide. Jacketed bullets for the 38-55 or 375 are not cheap and some are hard to find. The Barnes are about a dollar a bullet and Vollmer was shut down for a bit to retool.

    DEP


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