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Old 03-27-2007, 20:44   #14
HOLLiS
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Join Date: Feb 2005
Location: Pacific NorthWet
Posts: 1,495
Quote:
Originally Posted by Gene Econ
TS:

I find it much easier to know the ordinate given a 300 elevation. About 6" at 160 meters. Go from there with holds until a fellow is under 30 meters and then it is either point of aim or hold about 3 inches higher than the impact location.

I spent a couple of hours on a KD range trying to figure out a true reduced 300yard zero. Closest I got was about 33 yards. I also shot two targets to show trajectory. Zeroed up at 300 pretty solid then shot the targets at 5, 10, 25, 50, 100, 160, and 200 as a graphic representation of trajectory of M-855 ball fired from a carbine.

Was pretty neat and if one has not done such a actual test, he will be very surprised at the results. Not what one would envision. It also provides a good challenge to those who are anal about shot placement as there is not a real big vertical spread so basically center hold is just fine from a barrel to 300.

Gene

Gene, are you familiar with the term "cone of accuracy" (I think that is the right term). It set a shooter up that between two ranges, the bullet will hit within a circle of a certain size diameter. Sort of saying what you are saying, If you shoot at center, your bullet will be in the kill zone. It maybe not be surgical or accurate enough for very long shots.

Basically the rifle is sighted in at center at a set distance, lets say 243 M. That from muzzle to 350 M the bullet will be within a 6 inch circle(cone) anywhere between those two ranges. For a hunter it takes range estimation out of the equation with in those distances.

H.
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