Text 511, 57 rader
Skriven 2007-04-28 20:07:51 av Joe Bruchis (1:3828/12)
    Kommentar till text 473 av Roy Witt (1:397/22)
Ärende: caliber
===============
Hello Roy.

28 Apr 07 13:54, you wrote to me:

 RW> 26 Apr 07 11:33, Joe Bruchis wrote to All:

 JB>> Hello everybody.

 JB>> Well!  I was surprised when I looked it up myself:


 RW> A .22 is really expressed as 5.65mm, as the bullet is larger than .220
 RW> at .223 and .224 ... When converting from inches to mm, it's a good
 RW> idea to use figures three places after the decimal point, four is
 RW> better. One or two places converting in reverse is ok, as the figure
 RW> will end up four places on a good calculator ... 5.58mm = .2198 -
 RW> while 5.65mm = .2224

Wow!  Thanks for the info.


 RW> This is from my own experience, being a 'reloader' of such a round.
 RW> Although it's an AR, M-16 round used by the military, I have two
 RW> rifles chambered for this round, which is aka .223 Winchester, or
 RW> 5.65mm. I have boxes of M-16 brass that was given to me by a US Marine
 RW> instructor based on Camp Pendalton, near Oceanside, CA..

I'd like to see that Winchester.  At my experience level for rifles (newbie) it
sounds like it's not a common model.

 JB>> caliber (cal) [2]
 JB>>     a measure of the relative length of a gun barrel, defined as
 JB>> the length divided by the diameter of the bore. Thus a 50-caliber
 JB>> gun on a warship has a barrel 50 times longer than its bore.
 JB>> Confining the shell within the barrel for a longer time increases
 JB>> the velocity, so guns with a higher caliber usually have a longer
 JB>> range.
 JB>> === Cut ===

 JB>> Shows you what I didn't know! (:

 RW> Here's some more then.

 RW> The above is correct to a point. There comes a time when the expanding
 RW> gas from the ignited powder charge in the shell runs out of energy to
 RW> propel the missle to any further gain in velocity. The 50 x 50 formula
 RW> has probably been a constant for many, many decades.

Thanks, Roy. You have a lot of experience and knowledge to share. You also
answered a question that's been bugging me. If people could drop the USA
bashing, you'd have more time for messages like this one.

-=[Joe]=-


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