16 Jun
1998
16 Jun
'98
2:58 a.m.
At 10:20 PM 6/15/98 -0500, you wrote:
Well if you want to be exact, the .308 and 7.62mm rounds are two
different things! .308 is the commercial designation and 7.62mm is the
military designation and the two rounds are slightly different. Many
people interchange them and think that they're both the same but many rifle
manufacturers warn you against using the wrong type in their product. The
difference in the two is in the curviture of the bullet where it seats
against the lands in the barrel. If you use the wrong type of ammo the
incorrect bullet seating can cause excessive barrel pressure and damage or
burst the rifle barrel or action.
Furthermore, the nominal bullet size for both the .308, 7.62mm and the
.30-06 are all .308 inches diameter. BUT the rifle barrel bore diameter is
.300 inches, that's why the rifles that these rounds are used in are
considered to be .30 caliber and why the .30-06 is ".30". The grooves in
the rifle barrel have a slighly larger diameter (.306") than the bore but
the groove diameter is still smaller than .308". The bullet has to be
squeezed down in size slightly to pass through the barrel. This is called
"upsetting". This provides a gas tight seal and a higher bullet velocity
and less gas cutting of the barrel material.
And no, there's no "A" in ought.
I have lots of hobbys too. Too many!
Joe
I know I can
type it as: "You know, the 00's really suck!" But how the
heck
are we supposed to pronounce it?
Simple, as anyone who owns a .30-06 deer rifle can tell tell you, it
will be the "double ought" decade. Same as 100 years ago, the first
year will be "ought zero". BTW, .30-06 is a US rifle caliber, .308
inches (7.62mm), designed in 1906, or "thirty ought six". 20 years from
now, we'll be talking about that old 500Mhz P II made back in "Ought
One".
Jack Peacock
Hi guys & gals!
Uhh, lets not confuse .308in bullet size with bullet caliber.
The .308 Winchester cartridge was introduced in 1952 and adpoted in 1954 by
the U.S. military. It was designed with a reduced overall weight(a little
shorter).
The idea was that a G.I. could carry more ammo into combat! The correct
military designation for this cartridge was 7.62x51mm NATO.
BTW, I believe it's "aught" with an A!
Sorry, computers are not my only hobby.
Cliff Boyer