Marlin 357 mag to 25-20
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  1. #1
    Wrangler
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    Marlin 357 mag to 25-20

    Looking to build a Nj coyote rifle. Law states rifles are ok late season as long as they are 25 cal or less. I had considered a win y 94 in 25-35 or rebarreling a 30-30 marlin 336 to 25-35, but I love the 25-20 and wanted to build something trully unique. So I was thinking of rebarreling a marlin 357 mag to 25-20. The COAL is the same between the two and the rim diameters are very similar. The question is, can it be done? The 357 has a rim of .440 and the 25-20 is .408. Is that too much of a difference? Is there a better marlin to start with? I could get an old marlin in 25-20 but I want a newer rifle so I don’t feel bad running the 25-20 on the hotter side. I would start with a JM marlin not a remlin for what it’s worth.
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    You want unique? How about a .256 Win conversion?
    ..

  3. #3
    Wrangler
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    Hmm didn’t actually consider that would take away some of the complexity of converting from a 357 to a 1/4 bore. And it’s a zippier round. Kind of a modern 25-20. But I do love my hyphenates.
    gunscrewguy likes this.
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    I think it would be way more practical to buy a 1894CL in 25-20.
    Old men with Garands do not panic.

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    you want hyphenated?
    used as a scoop, a 357 Mag case holds 25 grains of (3fg?) Goex Black powder.
    With a drop tube and some compression in the bottleneck case you could have a 25-25!
    ..

  7. #6
    Gunfighter
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    Quote Originally Posted by 25/20Marlin View Post
    I think it would be way more practical to buy a 1894CL in 25-20.
    I bought one a few months ago on GunBroker. There are usually 2 or 3 of the 1990's vintage 1894CL .25-20 rifles for sale at any given time. Prices tend to range from $750 to $1000 depending on condition and how many bidders are interested in it. If you don't see any, be patient and check back every few days.
    25/20Marlin likes this.

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    Sidewinder
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    I would look for a Marlin M 62 in 256 Win Mag. They can be found for a bit less than a M 1894 in 25-20. Most either love them or not ?

    Jedman
    mikej and Travlin like this.

  9. #8
    Gun Wizard
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    The 256 was a 357 necked down to 25 cal. It was chambered in a weird Ruger single shot revolver and the 62 Marlin, a "modern" lever style. Both went over like a lead brick as did the cartridge. The 25-20 is no great shakes even for a reloader at this time. Most have to form them from 32-20 brass and molds and bullet choices are not over whelming.

    Midway USA had a new made Winchester 94 in 25-35 that would be your best bet. It is not cheap but would be less costly than a custom rifle conversion and would be made for the caliber.

    DEP

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    Esteemed Sharpshooter
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    It would make more sense to buy a 1894 JM in 25/20. Loading them has never been a big deal for me. 256 is a whole different ball game. 256 brass is scarce and forming them from 357 is a PIA. You can still pick up 25/20 brass 1x around shows. If not you can do
    32/20s. It's no big deal and 25/20 is a useful little cartridge.
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    Don’t think I’d mess with a Marlin 357. I would rebarrel a 30 30 to 219 Zipper.
    Pereira, northmn, JW/OK and 2 others like this.
    Team 1894 member #67 1977 44 mag.
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    1980 Marlin 3080 Trail Rider & Win 94 Custom Trapper


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