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Thread: Thunder 380 rebarrel to .32 acp

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    Thunder 380 rebarrel to .32 acp

    Picked up a new Thunder (Firestorm) a few weeks ago and have since put a couple hundred rounds through it. I bought this with my recoil sensitive gf in mind but it has left even my hand sore.
    I know the 32 has been out of production for awhile but I managed to pick up a spare 32 barrel. It seems to me everything is interchangeable and that the 380 mags will run 32. I'm sure it's highly unlikely, but has anyone tried this caliber downsizing?

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    Re: Thunder 380 rebarrel to .32 acp

    If you have the barrel, any good gunsmith should be able to swap it out and you will have your smaller caliber.
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    Re: Thunder 380 rebarrel to .32 acp

    Quote Originally Posted by R.Ph. 380 View Post
    If you have the barrel, any good gunsmith should be able to swap it out and you will have your smaller caliber.
    was thinking of doing it myself, setting up a similar jig like makarov.com used to offer

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    Re: Thunder 380 rebarrel to .32 acp

    The mag lips may need to be pinched together a bit to feed the smaller round. The .32 magazine may still be available & it will work in the .380.
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    Re: Thunder 380 rebarrel to .32 acp

    no jig or barrel press needed, the barrel taps out easily with a little warming from a butane jet lighter or small torch. propane will work too but not much is needed at all. i don't think it's even a press fit. the hardest thing is putting the small parts back together

    my new 32ACP barrel even lined up the pin hole perfectly, but i re-chambered to 32NAA (380 case necked down to 32) so i don't know if the 380 extractor / breech face works with 32ACP?

    FWIW 1st time out it shoots like a kitten but needed little ramp work. LGsmith must've had pity on me, he did some dremel work, shortened the barrel to CC length and gave it a crown for zero Bersabucks! i still need to test it again but I'm pretty confident

    watch that ramp on the 32 barrel it's different than the 380

    the 32NAA-CC lives, next I'm doing a 32NAA Combat Plus CC
    Last edited by Vito Glisenti; 09-24-2017 at 08:11 PM.

  6. #6

    Re: Thunder 380 rebarrel to .32 acp

    Quote Originally Posted by Vito Glisenti View Post
    no jig or barrel press needed, the barrel taps out easily with a little warming from a butane jet lighter or small torch. propane will work too but not much is needed at all. i don't think it's even a press fit...

    my new 32ACP barrel even lined up the pin hole perfectly, but i re-chambered to 32NAA (380 case necked down to 32) so i don't know if the 380 extractor / breech face works with 32ACP?

    FWIW 1st time out it shoots like a kitten but needed little ramp work.
    watch that ramp on the 32 barrel it's different than the 380...
    thanks for the info and the heads up! will give some feedback once the barrel gets here

  7. #7

    Re: Thunder 380 rebarrel to .32 acp

    For future reference, here is a link posted on the Walther forums doing exactly what I'm going to. http://www.waltherforums.com/forum/#/topics/52329

    I've run 32 acp through my 380 mag and it works fine. The only thing I MIGHT need to replace would the recoil spring, but I doubt it. The extractor works fine as well.

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    Re: Thunder 380 rebarrel to .32 acp

    If you swap out barrels, there are two things that must be done: 1) the extractor cut-out in the barrel must align w/i a few thousandths of the cut-out in the frame. 2) The hole for the barrel retaining pin must line up as close to perfect as possible.
    If you do 1) correctly, then 2) should be aligned properly also. If it's not well aligned, remove it and try again. Unlike Mr. Glisenti, I've found that some barrels are a real bear to remove, esp. if they've been shot a lot. They tend to build up carbon deposits between the barrel and the frame. Heating the frame and dosing it w/ a good penetrating oil a few times and leaving overnight will help somewhat. Don't try to remove the barrel using a press; you will almost certainly bend the frame and kill the pistol. I use a brass rod a bit larger in diameter than the outside dimension of the barrel (3/8" works well) that I've turned down to fit the inside diameter of the barrel and a fairly light (4 oz.) hammer. You should make a drift for both removal and replacing the barrel as the chamber end of the barrel has a larger i.d. than the muzzle end.
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    Re: Thunder 380 rebarrel to .32 acp

    Quote Originally Posted by Cyten View Post
    For future reference, here is a link posted on the Walther forums doing exactly what I'm going to. http://www.waltherforums.com/forum/#/topics/52329
    link goes to main forum, do you have to be logged in or is the link old?

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    Re: Thunder 380 rebarrel to .32 acp

    Quote Originally Posted by Vito Glisenti View Post
    link goes to main forum, do you have to be logged in or is the link old?
    It appears that you have to be logged as a member for the link to work
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