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Author Topic: BB Measurements  (Read 10541 times)

Offline Raith

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BB Measurements
« on: March 27, 2007, 11:24:21 AM »
I used a Browne & Sharpe Micrometer that measures to the ten thousandths place "0.0000"  Measurement was taken by inserting BB into micrometer and then torquing tensioner until the measurement stabilized.  Three measurements were taken on each BB, rotating the BB to a new spot at least 90 degrees away from the previous measurement to ensure that no "flattening" of the BB was hampering the true measurement.


Excel 0.25g

 - Initial Measurements -

01 _ 0.2307" 0.2317" 0.2319"
02 _ 0.2316" 0.2316" 0.2316"
03 _ 0.2317" 0.2318" 0.2318"
04 _ 0.2306" 0.2315" 0.2318"
05 _ 0.2315" 0.2310" 0.2314"

 - Averages 3 Measurements Of Each BB -

01 _ 0.23143" (Rounded Down)
02 _ 0.23160"
03 _ 0.23177" (Rounded Up)
04 _ 0.23130"
05 _ 0.23130"

- Average of Average of Each BB -

BB _ 0.23148" (Rounded Up)

0.23148" is 5.879592mm


Infinity 0.28g

 - Initial Measurements -

01 _ 0.2307" 0.2312" 0.2318"
02 _ 0.2320" 0.2326" 0.2311"
03 _ 0.2313" 0.2320" 0.2318"
04 _ 0.2328" 0.2319" 0.2334"
05 _ 0.2345" 0.2319" 0.2318"

 - Averages 3 Measurements Of Each BB -

01 _ 0.23123" (Rounded Down)
02 _ 0.23190"
03 _ 0.23170"
04 _ 0.23270"
05 _ 0.23273" (Rounded Down)

- Average of Average of Each BB -

BB _ 0.23205" (Rounded Down)

0.23205" is 5.894070mm


Killer Beez 0.25g

 - Initial Measurements -

01 _ 0.2335" 0.2338" 0.2329"
02 _ 0.2324" 0.2323" 0.2339"
03 _ 0.2329" 0.2341" 0.2322"
04 _ 0.2330" 0.2343" 0.2327"
05 _ 0.2325" 0.2335" 0.2334"

 - Averages 3 Measurements Of Each BB -

01 _ 0.23340"
02 _ 0.23287" (Rounded Up)
03 _ 0.23307" (Rounded Up)
04 _ 0.23333" (Rounded Down)
05 _ 0.23313" (Rounded Down)

- Average of Average of Each BB -

BB _ 0.23316"

0.23316" is 5.922264mm


TSD Tactical Black 0.25g

- Initial Measurements -

01 _ 0.2346" 0.2346" 0.2342"
02 _ 0.2338" 0.2345" 0.2343"
03 _ 0.2335" 0.2336" 0.2338"
04 _ 0.2340" 0.2334" 0.2337"
05 _ 0.2340" 0.2332" 0.2336"

- Averages 3 Measurements Of Each BB -

01 _ 0.23447" (Rounded Up)
02 _ 0.23420"
03 _ 0.23363" (Rounded Down)
04 _ 0.23370"
05 _ 0.23360"

- Average of Average of Each BB -

BB _ 0.23392"

0.23392" is 5.941568mm (Rounded Up)



Data Averages

5.941568mm _ TSD Tactical Black 0.25g
5.922264mm _ Killer Beez 0.25g Premium Grade
5.894070mm _ Infinity 0.28g Premium Grade Hyper Precision BB
5.879592mm _ Excel New 0.25g BBs With Ultra Accuracy


Addition Log

04/21/07 - TSD Tactical Black 0.25g
03/27/07 - Excel New 0.25g BBs With Ultra Accuracy
03/27/07 - Infinity 0.28g Premium Grade Hyper Precision BB
03/27/07 - Killer Beez 0.25g Premium Grade

---

If someone wants to reveal other facts contained within this information, go right ahead.
« Last Edit: April 21, 2007, 04:16:38 PM by Raith »
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Offline Ganef

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« Reply #1 on: March 27, 2007, 11:28:47 AM »
Well showing that certian bbs are larger on average means that there is less air escaping around them so more energy is imparted to them resulting in higher muzzel velocities. Which I think hold consistent with testimonies from chrono stations at national events.

The data also shows that Both excel and Kbs vary in size in the tenthousandths place whereas the infinity bbs vary in the thousandths place making them appear far less precicely made.

Great job Raith!
« Last Edit: December 31, 1969, 05:00:00 PM by Ganef »
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Offline XavierMace

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« Reply #2 on: March 27, 2007, 01:29:13 PM »
If possible, could we add a few more BB's to the list?  I would like to see Phx .28's, Digicon .38's, and SGM's.

Either way, great work.
« Last Edit: December 31, 1969, 05:00:00 PM by XavierMace »
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Offline Vince

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« Reply #3 on: March 27, 2007, 01:42:14 PM »
I'm sure if you get those types of BBs to Raith, he'd add them.
« Last Edit: December 31, 1969, 05:00:00 PM by Vince »
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Offline Raith

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« Reply #4 on: March 27, 2007, 02:28:35 PM »
Quote from: "XavierMace"
If possible, could we add a few more BB's to the list?  I would like to see Phx .28's, Digicon .38's, and SGM's.

Either way, great work.


I only had 3 types of BBs.  If you have 5 of each to give me, I'll measure them and post the results.
« Last Edit: December 31, 1969, 05:00:00 PM by Raith »
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Offline XavierMace

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« Reply #5 on: March 27, 2007, 03:37:42 PM »
Where can they be dropped off?

I also have some .23 AE's if you care to add them as well.
« Last Edit: December 31, 1969, 05:00:00 PM by XavierMace »
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Offline Raith

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« Reply #6 on: March 27, 2007, 04:44:46 PM »
Leave them with Ron, Jeremiah, or Paul at Jungletoy and I'll get them eventually.
« Last Edit: December 31, 1969, 05:00:00 PM by Raith »
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Offline Kurn

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« Reply #7 on: March 27, 2007, 05:29:54 PM »
It would be interesting to know how much the weight varies too.
« Last Edit: December 31, 1969, 05:00:00 PM by Kurn »
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Offline Pyskee

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« Reply #8 on: March 28, 2007, 12:56:41 PM »
I would like to know how AE .25 BB's vary in weight and size if you could do that.

And a lot of you probably already know about these reviews, but just in case:

http://www.airsoftmechanics.com/reviews.php?aid=12
http://www.airsoftmechanics.com/reviews.php?aid=15
http://www.airsoftmechanics.com/reviews.php?aid=16

It also only really cover .2 BB's, but whatever, it's something for people who use .2's.
« Last Edit: December 31, 1969, 05:00:00 PM by Pyskee »
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Offline chris

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« Reply #9 on: March 29, 2007, 09:17:55 PM »
Wow thats a really good study if u read it. SOme of the good BB's like Excel weren't that good. Did they do any later studies to compare different batches of BB's ?
« Last Edit: December 31, 1969, 05:00:00 PM by chris »
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Offline XavierMace

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« Reply #10 on: March 30, 2007, 09:15:25 AM »
I've mostly been using AE's of late and those test pretty much backup my feelings about them.  They have been very consistent BB's at a reasonable price.  I've been buying 3 bag specials or Bulk from ASGI.
« Last Edit: December 31, 1969, 05:00:00 PM by XavierMace »
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Offline Uchiha Itachi

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« Reply #11 on: April 05, 2007, 12:34:53 PM »
Do you want some Systema .2s?

I am going to be ordering mags and accessories this week so I won't have them till next week. Damn P90 mags...
« Last Edit: December 31, 1969, 05:00:00 PM by Uchiha Itachi »
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Offline Raith

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« Reply #12 on: April 05, 2007, 01:15:19 PM »
Quote from: "Uchiha Itachi"
Do you want some Systema .2s?

I am going to be ordering mags and accessories this week so I won't have them till next week. Damn P90 mags...


I'll measure any BBs anyone gives me.  Don't go out of your way to get some, though.
« Last Edit: December 31, 1969, 05:00:00 PM by Raith »
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Offline XavierMace

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« Reply #13 on: April 05, 2007, 01:40:07 PM »
I will try to drop them off with Paul this weekend.  I will drop off some AE .25's, Phx .28's, SGM's, and Digicon .38's.
« Last Edit: December 31, 1969, 05:00:00 PM by XavierMace »
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Offline Raith

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« Reply #14 on: April 05, 2007, 05:08:58 PM »
I only need 5 of each kind, I know some can be (relatively) expensive.
« Last Edit: December 31, 1969, 05:00:00 PM by Raith »
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