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Old 03-16-2009, 08:07 PM   #1 (permalink)
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Quick question: whats the weight of a .43 cal paintball?

Ok, technically it should be 'mass', but you get the idea

Grams preferably.

Thanks.
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Old 03-17-2009, 03:36 AM   #2 (permalink)
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Is that a European .43 cal paintball? Or an African .43 cal paintball?


Sorry, I couldn't stop myself.
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Old 03-17-2009, 06:27 PM   #3 (permalink)
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Off the top of my head, I believe they're somewhere around .5 grams, if even that much

If I remember right, at 300FPS, a paintball has about 12 joules of energy, whereas a 43cal has 1-2 at 350fps.
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Old 03-17-2009, 06:28 PM   #4 (permalink)
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Quote:
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Is that a European .43 cal paintball? Or an African .43 cal paintball?
Are you suggesting paintballs migrate?
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Old 03-17-2009, 06:58 PM   #5 (permalink)
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Quote:
Originally Posted by sartek View Post
Off the top of my head, I believe they're somewhere around .5 grams, if even that much

If I remember right, at 300FPS, a paintball has about 12 joules of energy, whereas a 43cal has 1-2 at 350fps.
ok, lets crunch some numbers...

Joules = 1/2 * Mass (kg) * Velocity(ms)^2 (all in metric).

so 1/2 * .003kg (3 grams, average .68 cal ball) * 91.44ms (300 fps)^2 gives us 12.54 Joules.

so Mass = 2 * Joules / Velocity^2

2 * 2 Joules / 106.88ms(350fps)^2 = .00035kg, or .35 grams. Damn that's light.

A 36% decrease in diameter leads to an 88% decrease in mass. That's probably pretty close. Anyone good who's good with density and volume want to check that?
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Old 03-17-2009, 07:09 PM   #6 (permalink)
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Ok, did the density equations myself.

Volume of a sphere = 4/3 pi r^3

So a .68 cal ball has a volume of .1646 cubic inches.
A .43 cal ball has a volume of .0416 cubic inches.

Assuming they have approximately the same density, and density = mass over volume...

3 grams / .1646 cubic inches = X grams / .0416 cubic inches

X = .75 grams. Ok, a bit heavier this time, but still damn light.

Would someone please just weigh the darn things before I go and try and figure out the different densities of the shell and fill?
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Old 03-17-2009, 08:54 PM   #7 (permalink)
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A 3g paintball at 300 fps is about 9 fpe.
You can blast a .43 at about 580 fps before it gets close to 9 fpe.

Of course you should probably factor in that it would be the same impact in a smaller area, but then again they will also lose speed faster.
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Old 03-18-2009, 03:56 AM   #8 (permalink)
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Quote:
Originally Posted by Titus View Post
Are you suggesting paintballs migrate?
Well they could be carried
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Quoting WOLLFFY on AO;
I don't recall mentioning trades, especially not for smart Farts. Thanks though.
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Old 03-18-2009, 04:03 AM   #9 (permalink)
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6 grams from memory, and yes 500+fps still does not impart the same impact as .68
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Old 03-18-2009, 07:51 PM   #10 (permalink)
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Foldadoom, the average paintball weight of a 68 cal is about 3 grams. If you're shooting 6 gram 43 cal balls, I'm hiding behind plywood.


Found the calc:
ENERGY CALCULATOR

3g @ 300fps = 12.542 joules / 9.2504 FP
.5g @350fps = 2.8452 joules / 2.0985 FP

.75g @ 600fps = 3g @300 fps.
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