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  1. #11
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    Join Date
    Jan 2013
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    Bloemfontein
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    31

    Default Re: 7.62 & .308 Win anorak question

    Studying these type of things drove me to the conclusion that sometimes the bore and groove diameters, chamber dimensions, case walls, etc evolve from the amount of jane smoked during development.

    The published name has a direct link to the celebrations after succesfully firing the first prototype.

    But ja, mostly A-R is correct.

    Kriek

  2. #12
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    Apr 2019
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    Cape Town
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    646

    Default Re: 7.62 & .308 Win anorak question

    Just remember, what most think of as calibre is really just the name of the cartridge which may or may not be the same as the bore size. It can also be the bullet diameter. With either case length, blackpowder charge, year of development or just a brand name. Or, like the .38special, the diameter of the case.

    Calibre is actually just the size of the bore. Usually the size of the largest diameter round (unrifled) gauge that can be pushed through without engaging the rifling. This size does not include the depth of the grooves. In this way, .308Win, .300Winmag and 7.62x39 are all 30 calibre because the bore sizes are all .30" or the metric equivalent (7.62mm).

  3. #13
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    Join Date
    Aug 2012
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    The moral high-ground
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    48
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    2,368

    Default Re: 7.62 & .308 Win anorak question

    Quote Originally Posted by Ds J View Post
    Nope. There is no unit standard because firearms started before German engineering (standardizing) was on the roll
    Germans cannot standardize...

    Every H&K pistol ever made uses a different magazine (excluding one or two models maybe...)
    Their service rifle uses a proprietary magazine, NOT the NATO Stanag mags compatible with NATO service rifles...
    "NATO" spec H&K 416's that are a blatant AR 15 rip off with a piston don't even work with regular AR mags (Magpul had to design a new mag to work with 416 rifles...)
    Try using BMW or Mercedes Benz spares from one model on another model (Year or model designation; take your pick)... Not possible. That honor goes to Japan / Mitsubishi / Toyota / Nissan. I'm surprised the crauts haven't managed to bring out cars with 17.5 inch diameter wheels yet or felt the urge to redesign the wheel nuts to use a proprietary thread size and pitch...

  4. #14
    User
    Join Date
    Jun 2010
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    Cape Town
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    55
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    1,212

    Default Re: 7.62 & .308 Win anorak question

    Quote Originally Posted by M43 View Post
    I'm surprised the crauts haven't managed to bring out cars with 17.5 inch diameter wheels yet or felt the urge to redesign the wheel nuts to use a proprietary thread size and pitch...
    The French have already got that market cornered decades ago so nothing further for the Germans to add. French cars can only be worked on by mechanics with 4 thumbs on their left hand, specially bred in outer Mongolia for the purpose. And don't be surprised that, for example. a French allen key has 7 and 1/2 sides whereas the rest of the world uses 6 sided allen keys. Obviously all the sides of the allen keys are also different lengths and each manufacturer has proprietary 7 1/2 sided allen keys each made of a specialised material that is incompatible with any other manufacturer's product and are never in stock, but they're always expecting stock in 3 months time..........

    ;-)

  5. #15
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    Join Date
    Feb 2016
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    1,110

    Default Re: 7.62 & .308 Win anorak question

    You guys have it all wrong as far as car brands go. The most evil designers of motor vehicles have to be the Italians; who gave us both Fiat and Alfa Romeo. Most of the swear words I know I learned while watching various relatives attempt to keep these monstrosities running. Who designs a bonnet that flips open to the front and gives the excuse that it is to keep the bonnet from opening while driving? If that is not admitting that you cannot design a decent bonnet catch I do not know what is!

  6. #16
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    Join Date
    Oct 2012
    Location
    Under the Jackalberry.
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    53
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    7,698

    Default Re: 7.62 & .308 Win anorak question

    My family owned a Peugeot that had a 7mm bolt in the brake system.

    The 'Muricans sell/sold bakkie rims and tires in 16,5" sizes.

    The Nipponese make M8 bolts that take a 12mm spanner and M10's that take a 14mm spanner, while the western civilisation uses 13 and 17mm spanners on them.

    So zee Jermans are not all alone with their proprietary parts. It makes it less worth while to copy them, so they think they can sell more original parts.

  7. #17

    Default Re: 7.62 & .308 Win anorak question

    On a different cartridge completely. I bought a Marlin 44m Lever Action. And then when buying molds found out that its actuall .429 to .431.

    So someone named it a 44M but in fact it should be a 43Magnum.

  8. #18
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    Join Date
    Jun 2020
    Location
    Centurion
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    56
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    67

    Default Re: 7.62 & .308 Win anorak question

    Quote Originally Posted by A-R View Post
    The Nipponese make M8 bolts that take a 12mm spanner and M10's that take a 14mm spanner, while the western civilisation uses 13 and 17mm spanners on them.
    13 is an unlucky number for the Japanese, so you won't find any original equipment 13mm bolt heads or nuts on a Japanese car or motorcycle leaving the factory.

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