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Old 09-17-2007, 05:16 PM #463
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Got this thread stickied so it doesn't fall off the face of the earth.
I appriciate it. I will try to update it tonight.
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Old 09-17-2007, 10:02 PM #464
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Mann,
any chance on that standard deviation with respect to the bulls-eye?
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Old 09-18-2007, 05:15 AM #465
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Mann,
any chance on that standard deviation with respect to the bulls-eye?
Ill give you the numbers so you can calculate it.

Also remember the bulls eye is not where the marker was aimed. It is the center in respect to the x axis, but is ~ 16" short on the yaxis.
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Old 09-18-2007, 02:53 PM #466
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great science project ;D
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Old 09-18-2007, 05:28 PM #467
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great science project ;D
unfortuently I didnt get to use it for that.
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Old 09-28-2007, 01:24 PM #468
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Question Mr.,Dr.,Sir Mann............

So... if I missed this sorry ... I was wondering about the diff in porting vs. un-ported I just bought the opsgear 18" unported ion fluted sniper barrel and they say it'll shoot 150' I think that's bull but all I want is 125-135 feet to be happy they had an outdoor test video.... Mann tell me what you think????????????

http://opsmedia.net/demos/interceptorbarrel.WMV <----opsgear video



is this 4 real???????
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Old 09-28-2007, 01:52 PM #469
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It's ashamed he's still not a mod or anything on here with all the time. Another engineer doing his job!
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Old 09-28-2007, 05:01 PM #470
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I'm curious about the unported barrel claims because without ports, the paintball physically deforms at the end of the barrel due to the dramatic turbulence change of the outside air. It's my understanding that porting serves as a means to smooth the transition and lower the effect of turbulence when the ball exits the barrel.
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Old 09-28-2007, 05:48 PM #471
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regardless of the effect of porting. the final product is still the same from the data he provided. the barrels really dont differ that much in accuracy one bit.
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Old 10-01-2007, 03:43 PM #472
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Any data updates?

Im still waiting for this to be complete before i buy a new barrel
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Old 10-04-2007, 06:17 PM #473
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regardless of the effect of porting. the final product is still the same from the data he provided. the barrels really dont differ that much in accuracy one bit.
This is true. I think you can conclude from this test that the correct paint to bore match and slickness of the bore are the factors when considering accuracy.
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Old 10-04-2007, 10:27 PM #474
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Mann.... you are GOD!!!!!!!!!!
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Old 10-05-2007, 05:47 AM #475
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the paintball physically deforms at the end of the barrel due to the dramatic turbulence change of the outside air.
Unless you have seen this actually happen, highly doubt it since a paintball's muzzle velocity is generally over 200mph. That's about equally hard as reading a license plate off a car going 200mph. You can't assume that something happens cause someone thinks it does. There is lots of hype and gimmicks and all sorts of loaded advertising in products.

My bro has a mech cocker, when he bought it, it came with a 12" green annodized, unmilled, unported aluminum barrel. Literally plain, save for the green. It's thick and heavy, has no porting, and no milling.

He's never complained about it. It has shot quite well, for who knows how long. Who made it? I'd like to know, but still don't. Is it a good barrel? I'd definately say so.
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Old 10-08-2007, 06:57 PM #476
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Tom Kay did slow motion pictures of paintballs being shot years ago when it was generally said that it was like launching a water balloon more then it being shot like a bullet.

The slow motion pictures showed no deformity from the air hitting the ball or when the ball left the barrel end if I recall correctly.

So basically the easily deformed paintball theory went by the way side. IIRC it also showed you only needed like 6 or 8 inches of barrel in regards to accuracy when compared to every length above it...so 8 10 12 14 16 18 inch doesn't matter. The 'accuracy' there is more due to using the barrel to site the target them its actual physical effect on accuracy.
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Old 10-10-2007, 01:05 PM #477
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IIRC it also showed you only needed like 6 or 8 inches of barrel in regards to accuracy when compared to every length above it...so 8 10 12 14 16 18 inch doesn't matter. The 'accuracy' there is more due to using the barrel to site the target them its actual physical effect on accuracy.
I agree with this, to a point. Under certain conditions a paintball can accelerate to full speed and accuracy with 6-8 inches of barrel, if the barrel isn't ported, or at least not much. But, there are quite a few variables that are involved that many people overlook. Bore size, bore finish, porting, paintball size, paintball weight, air pressure released, timespan of air pressure released, HP or LP, and individual marker and setup. Not to mention all those natural variables like wind, angle, and etc.

My point? 6-8 inches could be perfect for someone, or it could rip off another person. Further proving there is no perfect barrel length.

I've seen a 22 inch barrel, why someone would want one I'm not sure, but they seem to think it does some good. I've also seen some 6-8 inch barrels, personally, a 12 or 14 inch would satisfy me just fine, so mostly a matter of personal preference.
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Old 10-18-2007, 12:31 PM #478
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wait so which barrel kit if the best?
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Old 10-18-2007, 06:00 PM #479
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someone has been doing ther homework
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Old 10-21-2007, 06:47 PM #480
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Quote:
Originally Posted by Mann View Post
I guess your right the markers ability to control the balls velocity is important as far as the yaxis accuracy is concerned.
And the accuracy of the Y axis can be greatly affected by how much kick or recoil a given marker has. If gun A has little kick or recoil, and gun B has lots of kick or recoil, gun A is going to be easier to keep on target shot after shot where as gun B will be difficult to maintain the same accuracy shot to shot.

There are a lot of things on a gun that can affect accuracy. The gun is a major factor as far as accuracy goes. The barrel is just one of the many factors in the accuracy equation.

You've done great testing that sheads light on one component of the accuracy equation that has been a big question mark for many people.

Put a great barrel on a gun with lots of kick, and very inconsistent air regulation, and that barrel could be outperformed by a crapy barrel on a gun with little kick and great air regulation. Bottomline, is that putting a great barrel on any given gun isn't going to make that gun perform amazing. Other factors have to be addressed as well.

Kudos on the testing it's really great data!
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Old 10-24-2007, 01:00 PM #481
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It is really impressive how many myths and urban legends there are surrounding paintball, and even more impressive how many people firmly believe in them.

I think we need Adam Savage and Jamie Hyneman to take a good look at what makes paintballs fly straight…
http://en.wikipedia.org/wiki/Myth_busters
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Old 10-24-2007, 08:50 PM #482
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It is really impressive how many myths and urban legends there are surrounding paintball, and even more impressive how many people firmly believe in them.

I think we need Adam Savage and Jamie Hyneman to take a good look at what makes paintballs fly straight…
http://en.wikipedia.org/wiki/Myth_busters
That's a good idea, if they were able to dedicate 10 episodes to it.

Just look at what Mann did, all that research, yet there are still MORE myths to paintball, Mann spent probably hundreds of hours working on this and doing it, to come up with an analysis of barrels, probably the SIMPLEST part of paintball and a marker.

Plus, look how many times they did the "tailgate down saves gas" myth.
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Old 10-26-2007, 09:42 PM #483
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And the accuracy of the Y axis can be greatly affected by how much kick or recoil a given marker has. If gun A has little kick or recoil, and gun B has lots of kick or recoil, gun A is going to be easier to keep on target shot after shot where as gun B will be difficult to maintain the same accuracy shot to shot.

The person holding the marker dictates accuracy. The marker does not. I can shoot 100yards with my hunting rifle and hit the top of a bottle cap. I guarentee you that most people can take a .22 and not get anywhere close. My rifle has ALOT more kick than a .22 (its a weatherby7mm mag sp ed), yet has more accuracy

There are a lot of things on a gun that can affect accuracy. The gun is a major factor as far as accuracy goes. The barrel is just one of the many factors in the accuracy equation.

I agree there are many things, but the marker is basicly just a valve. The ball, barrel, person, and air source are the 4 main things. I put the marker in the same section as my cleats. Get something that is comfortable that you like, and it will work.

You've done great testing that sheads light on one component of the accuracy equation that has been a big question mark for many people.

Put a great barrel on a gun with lots of kick, and very inconsistent air regulation, and that barrel could be outperformed by a crapy barrel on a gun with little kick and great air regulation. Bottomline, is that putting a great barrel on any given gun isn't going to make that gun perform amazing. Other factors have to be addressed as well.

I agree. The person shooting it is probally the biggest factor

Kudos on the testing it's really great data!

Thanks
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