reloading .38 spl for .357 mag questions

reloading .38 spl for .357 mag questions

This is a discussion on reloading .38 spl for .357 mag questions within the Reloading forums, part of the Defensive Ammunition & Ballistics category; I wasn't sure if this belonged Defensive Ammunition & Ballistics or not. Admin feel free to move it. I have a sp101 in .357 mag. ...

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Thread: reloading .38 spl for .357 mag questions

  1. #1
    Member Array homersimpson's Avatar
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    Question reloading .38 spl for .357 mag questions

    I wasn't sure if this belonged Defensive Ammunition & Ballistics or not. Admin feel free to move it.
    I have a sp101 in .357 mag. I would like to buy .38 spl factory ammo, shoot it, and reload it to .38 spl specs. Are there any down sides to doing this? Will .38 spl eventually cut a ring in each cylinder the way a .22 short would (over time) in a SP101 chambered for .22 lr? Any other helpful comments/favorite loads would be appreciated.
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  2. #2
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    If cleaning is adequate then you should have no problem.

    It is less a ''cutting'' problem than carbon ring build up - which eventually could prejudice insertion of that extra 1/10" case of the 357.

    From my experience - we are talking quite high 38 thruput before build up becomes a major problem. If you go lead bullet then be prepared to delead a bit in the chamber throats after use.

    I'll put this over in the ammo forum.
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    Member Array homersimpson's Avatar
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    thanks P95! Just trying to sqeeze out some savings given the ammo prices.
    Two of my favorite responses:
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  4. #4
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    You could always light load .357 mag casings too.
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    VIP Member Array farronwolf's Avatar
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    Personally, I only load .357 ammo. I just load them light for target, plinking etc.

    The brass is actually cheaper to buy .357 than 38 spl., and the lead is the same piece of lead for both rounds, so no cost difference there.

    What it does save you is having to adjust your dies every time you switch between 38spl and .357, and having to remeasure your OAL, etc.

    The only changes are grains of powder, and maybe primers if you don't want to use spmagnum primers for you light loads.

    I would recommend labeling the boxes though. It is a great suprise to go from a target load of 900 to 1000 fps and then accidentally grabbing a box that is moving at 1400 fps that you loaded for hunting.

    Either way, it is much cheaper, and more fun to load your own, good luck.
    Just remember that shot placement is much more important with what you carry than how big a bang you get with each trigger pull.
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