40 S&W to 10 mm

40 S&W to 10 mm

This is a discussion on 40 S&W to 10 mm within the Reloading forums, part of the Defensive Ammunition & Ballistics category; I have dedicated reloading presses for various calibers. I acquired a Ruger GP 100 Match Champion 10 mm 6 shot. I have one press for ...

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Thread: 40 S&W to 10 mm

  1. #1
    Senior Member Array CDRGlock's Avatar
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    40 S&W to 10 mm

    I have dedicated reloading presses for various calibers. I acquired a Ruger GP 100 Match Champion 10 mm 6 shot. I have one press for 40 S&W.

    The dies are identical. So apart from changing the type of pistol primer and powder and adjusting the dies for resizing, I should be good to go, right?

    I have dedicated progressives for 9 mm, 40 S&W , 357 Magnum, 45 ACP, and a 44 Magnum.


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  2. #2
    VIP Member Array Chuck R.'s Avatar
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    You're going to have to relook your OAL and the amount of taper crimp your using due to the difference in OAL between .40 and 10mm.

    When I swap between .38SPCL-.357 and .44SPCL and .44MAG I use spacers under my belling (Powder die in Dillon speak), seating, and crimp dies to compensate. It saves a chitload of time adjusting dies.

    See IF something like this is available:

    https://www.midwayusa.com/product/1012401468

    Here's a decent article on .40-10mm:

    https://ultimatereloader.com/2015/05...ngeover-setup/
    ETXhiker and CDRGlock like this.
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  3. #3
    Member Array noylj's Avatar
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    For the cost, I would buy a die set dedicated to 10mm so I wouldn't have to re-adjust dies.
    If you have a case feeder, that longer cases might require a part swap.
    You'll need to adjust the powder die (up or down), the seating stem (up or down), and the crimp die (up or down). Not a big deal, but it is easier to me to simply have already adjusted dies for each cartridge.
    This is one reason why I love die bushings or tool heads...
    FLSlim likes this.

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