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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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Okay, I guess I shouldn't be too surprised that it can run that far. Afterall, a .223 can, with the right bullet, outperform many .308 loads in wind at that range and they have even less case capacity than the 7.62x39 case.
Dale -you are certainly correct about the 168 grain bullet being less than optimum at long range in the .308. The 180s and 190s are definately better ballistically. My point was that the 123 grain bullet in .264 is also far from ballistically anywhere near a 160 in that caliber, and I just pulled the well-known 168 gr. 308 bullet out of the hat for the sake of comparison.
Edited to add: I'm conceding only the velocity and wind bucking abilities at this point. I still think the .308 will have the energy advantage most of the time, depending on the exact load. Not that energy is even a factor for punching paper. Also, I looked up the 123 grain Scenar bullet in the .264 caliber. It has a very impressive Ballistic Coefficient of .547. I expected a much lower value... I'll have to look into this round further. I bet it's a hoot to shoot, (can't have any real recoil), and probably easy to reload, too. Edited by RONK - January/13/2008 at 14:14 |
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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ya 600, the grendel makes sense in an ar15 because of magazine length, but in a bolt there are better selections.
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Critter
Optics Apprentice Joined: April/20/2004 Status: Offline Points: 56 |
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So then, does anybody here know the difference between the words ACCURACY and PRECISION.
What is the difference between an accurate rifle and a precise rifle?
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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accurate is being able to hit what you are aiming at, the process allows for errors cancelling errors--- precision is the ability of the combination to repeat itself with the smallest statistical deviation.
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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all my guns are accurate, but some are more precise,--- precision is not a necessary and sufficient condition for accuracy, but accuracy is necessary for precision.
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Critter
Optics Apprentice Joined: April/20/2004 Status: Offline Points: 56 |
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I'm basically too lazy to do it, because I've done it many times elsewhere before, but here's the deal.
We are working with multiple concepts and a few aberrations and anomalies.
Definitions and are understanding are required for the following:
ACCURACY PRECISION REPEATABILITY
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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regrettably this falls into the "when does a river become long" catagory, or hard set classification. properties of each contain elements of the other therefore an intersection or union of sets (venn diagram) will always be the case. the only workable solution to this problem is (and it just doesn't exist to topics in this forum) are "FIS" or fuzzy inference sets, which are certainly past the orginal posters question, but would be a good one for you to start in the hunting and shooting section. |
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Critter
Optics Apprentice Joined: April/20/2004 Status: Offline Points: 56 |
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What happens in a scope is that when you turn the knob, it extends an end effector (like a hand) that moves the erector tube which contains the cross hair.
Now a MOA knob can be divided into increments which move the tube say 1/2 or 1/4 moa per click. This moves the point of impact about 1/2 or 1/4 inches at 100 yards.
The metric knob moves the erector the equivalent of .1 MIL or about 1 cm at 100 meters or 110 yards approx. 10 cm is about 3.9 inches. 1 cm is .394 inches at 110 yards or slightly less (.360") at 100 yards.
So when you compare 1/4 inch at 100 yards to .394 inches at 100 yards, it seems the 1/4 moa knob is more accurate. The 1/2 MOA per click not as precise. All are very similar and I think most will agree that for most shooting all will work fine.
I think that is right, but I will leave it to the experts to check my work.
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