DoN. Nichols wrote:
On 2008-11-17, Gunner wrote:

On Sun, 16 Nov 2008 23:03:01 -0500, "Buerste" wrote:


[ ... ]


If "extreme range personel interdiction" is more of a primary
concern....get a heavy barreled Savage in .308, and stick on a decent
fixed power scope, somewhere between 8x and 10x.

If anyone wants to know why most specialists prefer fixed power
optics, Id be happy to expound.


Could it be that the position of the cross-hairs shifts relative
to the target when the focal length is changed, so you have to zero it
at one focal length? (Or even worse -- the sliding components which
implement the zoom may shift with recoil, so even if you stay at a given
zoom point the cross hair point will shift.

Enjoy,
DoN.


Absolutely correct, DoN.

But it can be correct in software!

What the heck, I guess I can publish some of it now?

Some notes from an early development project.

Note the hysteresis diagram on the 4th page down...

http://www.home.earthlink.net/~cave-1/


--

Richard

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