Today's question.........

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Niner Delta
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Today's question.........

Postby Niner Delta » Thu Nov 12, 2015 8:59 pm

This is something I didn't know until recently looking at a conversion chart.
And the question is.........

Why are they referred to as 7.62x54r and 7.62x39 when they both have a bullet
diameter of 7.92 (.311) ???

Anyone ?????
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deadin
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Re: Today's question.........

Postby deadin » Fri Nov 13, 2015 12:16 am

Land diameter vs. groove diameter. Think .303 British (actually .311)
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Niner Delta
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Re: Today's question.........

Postby Niner Delta » Fri Nov 13, 2015 7:10 pm

Thanks deadin.

I guess I was wrong in thinking that it was the diameter of the bullet that determined what
size the round was called, and not the lands and grooves of the barrel.
Live and learn........... :D
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Peace is that brief, quiet moment in history.......... when everybody stands around reloading.
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Re: Today's question.........

Postby Aughnanure » Fri Nov 13, 2015 9:32 pm

Down here on the top of the world we have some weird restrictions on licenced pistols (no such restrictions imposed on criminal's guns); there are 'high' and'low' calibres, I can have a .357 Magnum 'cause that's a low calibre and measures under the .38 limit, but I can't have a .38-40 (except in a black powder pistol) 'cause that's a high calibre being a true .401.
I love logic :loco:
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Niner Delta
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Re: Today's question.........

Postby Niner Delta » Sat Nov 14, 2015 5:16 pm

Government logic = a true oxymoron............ :lol: :lol:
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Karl/Pa.
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Re: Today's question.........

Postby Karl/Pa. » Fri Jan 08, 2016 5:50 pm

The Russian 7.62x54r has a rimmed case (r stands for rimmed) much like a .22 BUT also the case is tapered.

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