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Thread: resizing 308 cases to form 7.92x33 Kurz

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    resizing 308 cases to form 7.92x33 Kurz

    I was looking at building a Mauser in 7.62x39 some time ago and and recently the subject come up....... someone was interested in a Mauser but in 7.92x33 Kurz.

    Ammo and loading components are available but tried to manoeuvre them to 7.62x39 more to do with cheap ammo but it seems the Milsurp 7.62x39 has dried up or doubled in value. Whilst having look at Lothar Walther they do drop in barrels for the K98icon in a variety of calibre's, including the 7.92x33, I've read that a varietiy of cases can be used to form the brass, including 308/ 7.62x51.......

    Looking on the net no one seems to give the correct forming and sizing dies required, just wonder if anyone here has any info etc on forming the cases from 308 brass.
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    Years ago, I saw a form die set from RCBS. Don't know if they still offer the set.
    The price is going to be significant.

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    I got a new Redding 8X33 form and trim die off of ebay really cheap. I was the only bidder. I use it to form other cases. For the 8X33 you would probably also need a reamer die to thin the necks.

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    There are a couple of old "Kurz" wildcats as well.

    .308 x 1-1/2, which is essentially a .303 Win (or 7.62 NATO case, shortened down to 1.5 inches and topped with any .308" diameter bullet from 110gn to 150gn.

    A development of that was the 7.62 x 41, which, as the name suggests, is a bit longer and better suited for 150gn bullets, but 125 / 130 gn ones are about right in the bullet weight / case capacity caper.

    These two go back well into to 1960s and are similar to some of the experimental rounds developed in Switzerlandicon in the 50's and 60's. Some editions of Frank Barnes "Cartridges of the World" actually list loading data.

    Possibly even easier and cheaper regarding reamers and dies? The "Cheap and Cheerful" version would be to cut the chambers with a standard 7.62 NATO reamer, but not drive it as far in. Re-engineering a FLS die by the grinding off of the appropriate length difference would be one approach.

    Or you could skip forward a few decades and play with blowing out 6mm BR brass to take the bullet of your choice. Cut a 6mm BR chamber to headspace and open the throat with a neck / throat reamer. Order a custom die or get your local precision toolmaker to grind out the 6BR die neck to suit. Somebody probably already offers it as a package.

    If you want a short, efficient round and are not obsessed with .308 bullets, the 6.5mm Grendel is a ripper. For a "standard" bolt-face, look at the 6.5 BR Remington, here:

    Reloading Data 6.5 BR Remington / 6.5mm BR Remington Metallic

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    Thanks Bruce, I read about the Barnes sometime back, also have two heavy profiled barrels in 6.5mm and 6mm for a rifle I was building many years ago....... but the said person backed out.

    The only reason for the Kurz was the abundance of .308 and 7.62mm brass and a job lot of 8mm heads
    Last edited by bigduke6; 01-27-2019 at 05:22 PM.

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    I did this very thing some 30 years ago for an owner of an STG. I made about 600 rds from Federal .308 brass. There was a size die and a trim die and a seater. That was all I had. The brass went straight through the size and then trim, and I reamed the inside of the neck. I reduced the load from the book by 10% and seated. Shooter said they were great... Dies and trim were made by RCBS.
    Regards, Jim

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    BigDuke:

    There were one or two "semi-auto-ed" StGs floating around Australiaicon back in the 1970's-80s and the owners went through this caper of pulling down "once-fired' 7.62 NATO brass, ALL of which, at the time, was Berdan primed. Where there's a will, and all that.

    I haven't checked yet, but if you own a Dillon power trimmer the job would be easier, IF Dillon do a 7.92 x 33 die it will come with the caveats related to other short cases like 7.62 x 39, How many hundred are you planning to form? Neck reaming is a drag, but essential, as is annealing the newly-formed neck and shoulder after the swarf has stopped flying.

    The only tiny detail is that the rim on a 7.92 x 33 is the same as a full sized 7.92 x 57 and thus THINNER than the one on a 7.62 x 51. In the good old days in the US, when the place was knee-deep in once-fired, Boxer-primed .30-06 brass, this was apparently not a problem. Then again, my recollection is that there is a bit of play in extractor / bolt-face gap on most rifles. The local StG owners, back in those salad days, did not seem to have any problems, however.

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    Thanks Jim, I managed to find a former Die, not cheap but would pay for itself over time I guess depending how much shooting he does, although I'm a downloader and a .22 man it has got me thinking, must admit I'm way behind regarding prices of ammo, was quite surprised regarding the price of the Russianicon 7.62x39 milsurp......... this used to be peanuts compared to many others. Even the Germanicon Surplus 7.62x51 which is very good is a lot cheaper.

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    Quote Originally Posted by Bruce_in_Oz View Post
    BigDuke:

    There were one or two "semi-auto-ed" StGs floating around Australiaicon back in the 1970's-80s and the owners went through this caper of pulling down "once-fired' 7.62 NATO brass, ALL of which, at the time, was Berdan primed. Where there's a will, and all that.

    I haven't checked yet, but if you own a Dillon power trimmer the job would be easier, IF Dillon do a 7.92 x 33 die it will come with the caveats related to other short cases like 7.62 x 39, How many hundred are you planning to form? Neck reaming is a drag, but essential, as is annealing the newly-formed neck and shoulder after the swarf has stopped flying.

    The only tiny detail is that the rim on a 7.92 x 33 is the same as a full sized 7.92 x 57 and thus THINNER than the one on a 7.62 x 51. In the good old days in the US, when the place was knee-deep in once-fired, Boxer-primed .30-06 brass, this was apparently not a problem. Then again, my recollection is that there is a bit of play in extractor / bolt-face gap on most rifles. The local StG owners, back in those salad days, did not seem to have any problems, however.
    Bruce, I wouldn't be making them, time isn't on my side these days, I'm just doing the leg work for someone but it does interest me, probably because it stems from the MP44....... I wonder what the FG42 would of been like with the Kurz

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    "I wonder what the FG42 would of been like with the Kurz"

    An overweight *****-cat?

    Interesting that when the East Germans got organized, they deployed a lot of StG 44s as the Mpi-44 with their new Volkarmee troops and "special" police units.



    It was rather obvious that they were right into "surplus" in a big way.

    The "new" uniforms looked just like the "old" uniforms, with only the badges changed to protect the guilty; as Kenny Everett used to say, "All in the BEST possible taste!".

    They also fully adopted the very last of the old Wehrmacht's helmets, the Mod 1945-B2, that one that looks like a "squashed" version of the archetypal "German" M-1935 / M-42 Stahlhelm. Those "new-production" Mod 1956 helmets turned up ins some interesting places, Namibia and Viet Nam, for starters.

    A bunch of StG 44s saw service in the early days of the Eritrea / Ethiopia war in the 1970s. Whether these were "sanitized" ones supplied by East Germanyicon is unknown.

    Attachment 98560

    Certainly, the DDR was the sole source of bulk 7.92 x 33 ammo by that time. These were rapidly superseded, as is the usual case, by swags of Mr. Kalashnikov's little rifle.

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