VERY OFFTOPIC: Re: first line of defense

From: Robert Coyote (coyyote@hotmail.com)
Date: Mon Oct 01 2001 - 15:13:30 MDT


.338 Lapua 250gr FMJ-BT (LockBase) at 3000fps

Bullet Drop (Inches)

      100y

      91m
     200y

      183m
     300y

      275m
     400y

      366m
     500y

      458m
     600y

      549m
     700y

      641m
     800y

      732m
     900y

      824m
     1000y

      915m

      +11.1
     +19.4
     +23.0
     +21.3
     +13.9
     Zero
     -21.1
     -50.3
     -88.6
     -137.0

Energy & Velocity (Muzzle : 4996 Ft.-Lbs., 3000fps)

     100y

      91m
     200y

      183m
     300y

      275m
     400y

      366m
     500y

      458m
     600y

      549m
     700y

      641m
     800y

      732m
     900y

      824m
     1000y

      915m

      Energy 4525
     4091
     3692
     3325
     2986
     2676
     2392
     2133
     1896
     1682

      Velocity 2855
     2715
     2579
     2448
     2320
     2196
     2076
     1960
     1848
     1741

Wind Drift (Inches) 10mph Crosswind

      100y

      91m
     200y

      183m
     300y

      275m
     400y

      366m
     500y

      458m
     600y

      549m
     700y

      641m
     800y

      732m
     900y

      824m
     1000y

      915m

      0.4
     1.8
     4.2
     7.6
     12.1
     17.9
     25.0
     33.6
     43.8
     55.6

----- Original Message -----
From: "James Rogers" <jamesr@best.com>
To: <extropians@extropy.org>
Sent: Monday, October 01, 2001 1:03 PM
Subject: OFFTOPIC: Re: first line of defense

> On 10/1/01 12:44 PM, "Mike Lorrey" <mlorrey@datamann.com> wrote:
> >
> > You want to look at ammunition which has relatively flat trajectory at
> > distance. 30-06 is okay, but on the small end. .300 Winchester Magnum,
> > .270 Remington, and upward to .416 Rigby, .375 H&H, .458 and .45-70 or
> > .45-100 have a flatter trajectory at greater range than the 30-06.
>
> Huh?!?! Most of the cartridges you mention most definitely do *not* have
a
> flatter trajectory than a .30-06. Hell, half of them can't do much more
> than 2,000 feet per second whereas the .30-06 can do a little under 3,000
> fps on average. And never mind that the .4xx and .375 H&H have hideously
> low ballistic coefficients, where the BC defines the flatness of a
> trajectory for a given initial velocity (higher BC = flatter trajectory).
>
> The .300WM has the same BC as the .30-06, but a little faster so flatter.
> The .270 (Winchester, not Remington) has a nearly identical trajectory as
> the .30-06 for a given BC, but in a slightly smaller platform.
>
> In fact, out of that entire list, only the .300WM is generally a flatter
> shooting cartridge than the .30-06 at a distance.
>
> I have to say, I am puzzled that you made these mistakes as I would have
> expected you to know these in your sleep.
>
>
> -James Rogers
> jamesr@best.com
>
>



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