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Thread: 7.62x39 Rimmed

  1. #21
    Boolit Grand Master
    Mk42gunner's Avatar
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    I like the looks of the long version and think it would be better for a rifle length barrel.

    I remember reading an article by Bob Milek, probably in the 1980's, where he stated that if the 7.62x39 had been easily available that he and Steve Herrett would never have modified the .30-30 case in the first place.

    Good luck with your project, and please keep us posted as to the results.

    Robert

  2. #22
    Boolit Buddy roadie's Avatar
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    The longer one does look good, but can you keep the base dimensions close to what you need? A lot of taper in a short distance with that case.

  3. #23
    Boolit Grand Master

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    In a single shot action where camming and extraction can be weaker"that taper is a plus.

  4. #24
    Boolit Master

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    Quote Originally Posted by country gent View Post
    In a single shot action where camming and extraction can be weaker"that taper is a plus.
    Would not the tapered case of the 7.62x39, whether it had a rim or not, produce more bolt thrust than a lesser tapered case?
    Could 'improving' the case help it grip the chamber wall better with less back thrust and provide higher velocities with the same pressure?

    You are rich in knowledge, just asking a question.
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  5. #25
    Boolit Buddy blackbahart's Avatar
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    already have the 40-65 on this action so hypothetically would guess at 35000 area would not be a problem and should actually less .

  6. #26
    Boolit Buddy
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    I've thought about using .357 Maximum cartridges to form rimmed 300 blackout cases. I think that would be a really cool lever gun cartridge.

  7. #27
    Boolit Master uscra112's Avatar
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    Quote Originally Posted by ThomR View Post
    I've thought about using .357 Maximum cartridges to form rimmed 300 blackout cases. I think that would be a really cool lever gun cartridge.
    Interesting idea. Would certainly be an easy job, just neck it down and trim. Personally I'd try to make it longer, since the BO is so notoriously short of powder space. Otherwise it won't be a medium game cartridge in a lever gun, because to get 1000 ft.lbs. the BO has to be run at pressures too high for most lever actions.
    flectere si nequeo superos, acheronta movebo

  8. #28
    Boolit Buddy blackbahart's Avatar
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    did the 300 BO on the 360 DW case in Jan on a small martini ,shoots quite nice with 150 gr and 110 .Just a bit more case capacity than the badger
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  9. #29
    Boolit Master

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    Did a 30 on the Super mag case years ago, to shoot in IHMSA. Had a 30-30 length neck as I had planned on using boolits with it.

  10. #30
    Boolit Grand Master

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    You need some taper to ease extraction a truly straight walled case will drag the full length. On an action that "pops" the case out it may only kick it out a little bit meaning it will need to be pulled out by had and on most single shots this is a tight area, especially with a scope over top of the action.

    Even the new round have a small amount of body taper from base to shoulder

  11. #31
    Boolit Master uscra112's Avatar
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    Quote Originally Posted by country gent View Post
    You need some taper to ease extraction a truly straight walled case will drag the full length. On an action that "pops" the case out it may only kick it out a little bit meaning it will need to be pulled out by had and on most single shots this is a tight area, especially with a scope over top of the action.

    Even the new round have a small amount of body taper from base to shoulder
    ??? The venerable .22 rimfire is as straight as straight can be, although chambers usually have a thou taper to them. Ditto most rimmed pistol cartridges. Now that I think of it, my old Stevens .25-21 is a very long straight cartridge. No trouble extracting that. Brass springback leaves the case a thou or two smaller than the chamber, unless you've grossly exceeded a safe load.
    Last edited by uscra112; 02-19-2020 at 08:06 PM.
    flectere si nequeo superos, acheronta movebo

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check