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July 7th, 2014, 20:47
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#1 |
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Bioval BBs - FPS drop?
In my last outdoor game I tried 0.25 Bioval BBs that were given to me as a door prize on some show.
I have noticed that FPS would drop from 390 which was nominal to the point where BBs would fly for no more than 30 feet. Thinking there is a problem with my gun I brought my backup gun and had the same issue. The first gun has PDI 6.01 455mm barrel with PDI W-hold rubber. The second has Prometheus 320mm (300mm) barrel with PDI W-hold rubber. When I got home I measured with digital caliper the diameter of bioval BBs and it was anywhere from 5.88 to 5.92mm. The BBs I usually use - Madbul 0.2 has diameter 5.92-5.93 mm in average. I wonder if this could be the source of the problem. Did anyone else had similar issue, or I am looking in a wrong direction? |
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July 7th, 2014, 20:50
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#2 |
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I had biovals jam in pretty much every gun i tried them in, one time leading to a hop up unit actually breaking. Stay very far away
__________________
Proud owner of:
-TM Scar H Vfc 416 -Ares G36c TM Glock 18c -G&G F2000 KWA Vector -VFC FNX45 G&G P90 -G&G M14 EBR G&G AKS-74 -KWA USP Tac TM 1911a1 -TM 5-7 WE MP5k -VFC Mp7 VFC HK417 -Scorpion Evo SMG Scorpion Evo Carbine |
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July 7th, 2014, 21:01
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#3 | ||
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Oh we do hate you, just never felt like wasting the time to give you a user title :P
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yeah the sizing sucks on them, idealy youd want 5.95-5.98mm but i had a buddy read some bbs as wide as 6.04mm biovals included. Definately gunna jam, and or lose a bunch of velocity in a 6.01-6.04mm barrel, a stock 6.06-6.08 inner they will work, or should at least but otherwise theyre useless, not to mention alot of em were not perfectly round and had alot of odd air bubbles ie: they didnt have one symetrical one in the middle but looked rather like swiss cheese when cut open
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FinchFieldAirsoft |
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July 7th, 2014, 21:10
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#4 |
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Same experience - Biovals jam.
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July 7th, 2014, 21:51
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#5 |
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Oh wow! Thank you guys, good to know!
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July 7th, 2014, 21:58
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#6 |
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I had great results with Bioval BB's... once they were put in the trash.
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Johann Hansen. 1./SS-Pz-Gren. Rgt. 20. 9th SS Hohenstaufen. Ontario's Largest WW2 re-enactment. OP Woodsman. Join us! |
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July 7th, 2014, 22:00
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#7 |
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Same issue here. I found they work in my KWA pistol though
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July 8th, 2014, 10:47
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#8 | |
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Save them for your tornado
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July 8th, 2014, 11:09
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#9 | |
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Quote:
__________________
Proud owner of:
-TM Scar H Vfc 416 -Ares G36c TM Glock 18c -G&G F2000 KWA Vector -VFC FNX45 G&G P90 -G&G M14 EBR G&G AKS-74 -KWA USP Tac TM 1911a1 -TM 5-7 WE MP5k -VFC Mp7 VFC HK417 -Scorpion Evo SMG Scorpion Evo Carbine |
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July 8th, 2014, 13:10
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#10 | |
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Hammburglar
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Biovals are bad. My PTW chewed them up.
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Bean - "Charlie is a sexual T-Rex" Quote:
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