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Can't get my head around this

 
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  #8  
Old 06-04-2011, 10:54 AM
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Re: Can't get my head around this

Quote:
Originally Posted by the444shooter View Post
Haven't you guys seen the movie "Wanted?" It's all in how you bend the bullet's flight path--Angelina Jolie does a great job demonstrating it, albeit with a pistol.





Sorry, nothing actually useful to contribute to this thread--just wanted to insert some humor--I too, have been perplexed about bullets "settling" down and grouping tighter at longer distances.
You jest. But, that's exactly what the proponents of this theory unknowngly advocate.

Any wobble will simply decrease accuracy/consistency. Hence, group size will be inconsistent and therefore allowing some groups to be tighter as well as looser at any distance.

All you have to do is draw it out on paper and trace the path of a bullet from a top view. Put a little wobble in your lines at the start. But once the bullet "goes to sleep", it will continue along that path in a straight line unless the wind, spin drift, or correolis moves it.

I really need to buy Bryan Litz's book to see if he addresses the subject.

Either that or contact Mythbusters.

JMO
-- richard
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  #9  
Old 06-04-2011, 11:53 AM
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Re: Can't get my head around this

The federal government has done some testing on this theory. The fellas at Los Alamos have concluded that it holds true. I work with the former director for the labs there. Though I also have my doubts, I am, as usual inclined to take his word for it. Do I completely understand it? No.

rscott, you make some good points. They are also some of the very same problems that I have with the theory.

If I remember next week, Ill ask him to further explain the phenomenon and Ill get back with his answers.
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  #10  
Old 06-04-2011, 03:53 PM
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Re: Can't get my head around this

Quote:
Originally Posted by lostart View Post
The federal government has done some testing on this theory. The fellas at Los Alamos have concluded that it holds true. I work with the former director for the labs there. Though I also have my doubts, I am, as usual inclined to take his word for it. Do I completely understand it? No.

rscott, you make some good points. They are also some of the very same problems that I have with the theory.

If I remember next week, Ill ask him to further explain the phenomenon and Ill get back with his answers.
I'll be keen to learn more.

Preferably something where someone proves that a rifle is consistently 1 MOA at 100yds and .5 MOA at 500 yds using a statistically sound model.

... and, no fair misadjusting parallax like SBruce pointed out.

All I've ever seen on the matter have been (a) theories, (b) analogies, (c) computer models written by someone with an agenda, and (d) annecdotal examples of instances where a smaller group occurred at a longer distance.

I'm ready to eat crow. But, I'm not going to fold because someone has a fancy title. Show me something convincing.

-- richard
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  #11  
Old 06-04-2011, 06:18 PM
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Re: Can't get my head around this

Litz/Berger did do a 'mythbuster' on the elliptical swerving notions. It only happens within feet of muzzle release and ain't causing decreasing moa, or anything else -decreasing.

I am one of 'those shooters' who consistently shoot tighter grouping in moa with distance.
I can't prove anything, but I believe it's scope parallax.
This passes more tests..

I also consistently shoot with scopes at 25x or higher, and I wear prescription glasses.
Any gun I shoot tighter at distance with, holds growing moa(as expected) when my son shoots them.
He has eagle eyes, perfect method, and is a far better 100-200yrd shooter than I. But I catch up by 500yds!

I've thought about it alot. Notice while shooting through glasses that there is just this little tiny area on the edge of the shooting eye lens that has to be focused through. This area NEVER matches a center lens prescription. That may be significant. Also, setting parallax on a scope is much easier and precise with growing distance. Our brains adjust vision to focus even with a relatively bad parallax setting -up close. But at distance, anything other than dead on seems blurry and moves more with head movement.
There is no band to play with at distance, that a brain could quickly adjust to.

Anyway, it's my theory, but I cannot acquire a solution from local lens-flippers...
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  #12  
Old 06-04-2011, 07:17 PM
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Re: Can't get my head around this

Found on Youtube:

Gus
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  #13  
Old 06-04-2011, 07:59 PM
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Re: Can't get my head around this

There is a simple answer to this question = Parallax.
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  #14  
Old 06-04-2011, 08:04 PM
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Re: Can't get my head around this

Notice the bullet PATH immediately set off on an angle(moa), and never deviating from that angle. So the 'going to sleep' aspect of this does not steer the bullet back to original POA, or cause reducing moa of impacts down range.
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