rifled barrels - Paintball Forum - Paintball guns and gear forums

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Old December 16th, 2010, 03:26 PM   #1 (permalink)
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rifled barrels

ok i know rifled barrels in paintball is the same as talking religion... you have to understand, i am an avid rifle shooter so when i come up paintball i tend to think like a rifle shooter. i mean even in black powder guns where you use a ball, riflings in the barrel help stabilize the projectile..

so with out trying to start a fight, lets about about some rifled barrels.

i have been looking around and most all of the rifled barrels really arnt that good. most of the time they dont give a bore size and never give the rate of twist. even the tippmen straightline™ doesnt give a bore size of the barrel, in stead they have "fins" which as i can tell is a sizer. so there is no intimate contact with the riflings.

Q: why are paintballs round? i understand its makes for easy feeding from a hopper but since they have markers that are magazine feed, any not a have your paint shaped more like a bullet?

what i am saying is a 9mm dia. and about 20mm long. anyone else like this idea?
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Old December 16th, 2010, 03:30 PM   #2 (permalink)
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if they were not round, we couldn't' use hoppers. They do make first strike rounds, which have fins on the back and are more streamlined. You have the manually feed them, or buy a special marker with a magazine feed. these first strike rounds are pretty pricey though.

The reason rifling doesn't do anything, is that paintballs are liquid filled, and are hardly ever perfectly round. They'll do whatever they feel liek doing once they hit the air. Everything you know about ballistics; toss it out when thinking paintball.
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Old December 16th, 2010, 03:49 PM   #3 (permalink)
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Tom Kaye at AGD (Airgun Designs) did some ballistic testing on all kinds of paintball types and ideas including boat-tail rifle style. Basically he came up with the fact that it could indeed be done, however the cost versus the benefit in performance would be prohibitive to the average paintball player, so the traditional, cheap, round ball has been around ever since. Certainly .50 cal is being bandied about, but the smaller size again doesn't match up well with the performance of the .68.

In terms of ballistic flight, the fluid filled sphere does not impart spin onto the fill making a very unstable object. If paintballs were solid instead of liquid, then a rifled barrel would be more effective.

Frankly, with fresh paint, consistent FPS, and a decent smoothbore barrel that is matched to the ball size, I can still put a pie plate sized group at 35 feet. And that is about all you can ever hope for.

Now 'first strike' rounds for paintball are around and are fin stabilized sabot style rounds. They are indeed very accurate and are for use in some magazine fed type paintball markers... but at about $1.50/shot, they aren't going mainstream any time soon... but they are fun to play with though.



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Old December 16th, 2010, 09:59 PM   #4 (permalink)
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couple points, #1, not only is the liquid fill in the paintball an issue but the reason you see the grooves on a bullet after it is fired is because the rifeling in the barrel digs into the lead to force it into a spin, but dig into a paintball shell and what happens? pop thats what. not to mention being a sphere even if you did get it spinning, unless you can keep it exactly on the axcess it will start to wander because of it. This is the reason the flatline has some bad accuracy. it has spin but you cant keep it on its axcess

as for the straightline, honestly its a bit of a marketing masterpiece. while yes it has rifeling the real accuracy boost comes in the form of the sized backs. you get the accuracy from the backs and new players think it works because of the rifeling which is why they bought it. once again tippmann gets money because of the ignorance of new players.

also, if paintballs werent round you wouldnt be able to walk out on the field with 200 ready to fire.
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Old December 17th, 2010, 12:45 AM   #5 (permalink)
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maybe im still missing something. i mean i know it is much easier to feed round balls but is having a mag-fed marker really heresy?

and maybe i didnt make my self clear enough about that 9mm paint projectile. what i was talking about was making wax jackets and filling them with powder and swag them so they are shaped like a bullet. that way when the lands of the riflings can cut in to the projectile. rap4 makes some .68" "golf balls" that are wax/powder. it seems like that would work a lot better.

and think about this, how any times do you burn 20 shots trying to hit some one 50' away? i should be able to hit a man at 100 feet with out sights. it wouldn't be that hard to make the projectiles nor would it cost alot.

and as for a normal, off the shelf paintball, a polygonal rifled barrel should give the ball a good spin with out braking the shell. arnt paintballs filled with gel anyways?
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Old December 17th, 2010, 01:12 AM   #6 (permalink)
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i think you are severly underestimating the production costs of something like that, typical paintballs run in the range of .02 to .08 per ball, nobody really uses the first stike rounds because A) you have to manually feed them one at a time but even if that is solved then you still have B) they are $2 each

also the shell and fill of a typical paintball are the same substance, your talking about making them of something different and keeping costs the same? good luck with that

how many times have i spent 20 shots trying to hit someone 50' away? depends, am i trying for an elbow or a torrso?

having mag fed isnt heresy, they do make them afterall, but look at it this way, your out on the field with a mag fed marker, lets say it holds 20 in each mag, your opponents marker has a typical hopper of 150, on the small side, you are in a firefight with eachother and you have to reload after every 20 shots, clear advantage to the hopper fed marker, he is moving up the field, you are messing with mags, not to mention lets say he has 3 pods with him, so hopper and 3 pods =600 paintballs, to hold the same quantanty you will need 30 mags, and lets say you find them cheap at $5 each, thats $150 just for mags that can only be used on this marker, not to mention good luck finding a way to carry 30 mags onto the field

sure some people like them but performance and cost wise its not a good option. paintball is not real life guns so there are very VERY few things that transfer over from one to the other
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Old December 17th, 2010, 04:08 AM   #7 (permalink)
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ok guys.i guess i have to change my mind about how i shoot paintball. i keep trying to force more of a marksmanship/sniper form of shooting. im just not a big fan of full-auto/throwing paint at some one. thats just kinda what it feels to me.

with all the self proclaimed paintball "sniper" i thought i was missing something since i cant seem to hit someone at 50' in one shot. i met Carlos Hathcock at camp perry once. i'm just saying its hard to pickup something that shoots and not try to be a marksman.
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Old December 17th, 2010, 04:24 AM   #8 (permalink)
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Not really. I was a marksman in the military, I quickly realized the first time I looked at a paintball that because of the liquid fill and a noticeable seam, good luck getting it to fly anywhere near straight in anything but a total vacuum. Although I'm still one of the slower firing players I know, I have no issues with using my marker as a mobile bunker.
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Old February 12th, 2011, 10:52 AM   #9 (permalink)
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If you want to play more like a real simulation, then airsoft might be better. They make bbs that are more bullet shaped, and they are harder (So the barrel doesnt cut into them.) Just a suggestion.
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Old February 12th, 2011, 11:13 AM   #10 (permalink)
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Also the bb's are solid, so there's no liquid fill counteracting the gyroscopic stabilization that is inparted upon a projectile from rifling.
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Old February 12th, 2011, 12:19 PM   #11 (permalink)
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Yeh whatever he just said...
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Old February 12th, 2011, 01:01 PM   #12 (permalink)
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theres non-spherical airsoft bbs out there?
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Old February 12th, 2011, 07:18 PM   #13 (permalink)
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Yesh they do. Not allowed on most fields though, so you need to take them just out in the woods if you want to use them.
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