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BB Weights
* 0.12g - These are the lightest bb. They are less accurate because they can be blown by the wind or drift off course, but they are light enough to be used by low powered guns.
* 0.20g - Most average to good guns take these bbs. They are heavy enough not to be affected by the wind very much and are quite accurate. They slightly lower the fps of the gun but the bb weight increases inertia so they accually INCREASE the "punch" of the gun. Also, .20g bbs are made much better quality than .12 because they have to stand up to the internals of more powerful guns.
* 0.23g - Almost as heavy as a .25, commonly used in more expensive or upgraded guns.
* 0.25g - The heaviest "common" bb. These significantly lower the fps of the gun but dramatically improve accuracy and resistance to wind. If you have a gas powered/upgraded gun these are the best weight to use.
* Heavier BBs - There are a few bbs heavier than .25. These include .33 and .45. Snipers sometimes use these but they aren't as frequently used on people because they hurt so much. Nothing but a sniper rifle can send these very far.
* Metal BBs - Metal bbs are associated with .117 caliber bb and pellet guns but 6mm metal bbs are available. These aren't safe for airsoft use because they can break the skin. Some snipers use alluminum bbs.
What BB Does My Gun Need?
* Trademe Guns
If you payed under $50 for a trademe gun use 0.12g bbs
* Spring Pistols
150-250fps - 0.12g
250-280fps - 0.12g or 0.20g. 0.20g will have better accuracy but a little less range.
280fps+ - 0.20g
* Spring Rifles
150-250fps - 0.12g
250-280fps - 0.12g or 0.20g. 0.20g will have better accuracy but a little less range.
280fps+ - 0.20g
* LPEGs (low powered electric guns)
0.12g ONLY! I've tried using 0.20g bbs with these guns. They just pop out of the barrel and hit the ground at about 25 feet away.
* Gas Powered Guns
280-330fps - 0.20g
330fps+ (upgraded) - 0.20g or 0.23g, 0.25g if it's a super custom upgraded gun.
* Snipers
Cheap/starter sniper rifles - 0.20g or 0.23g
350fps+ - 0.25g or heavier
NOTE: a lot of guns with fixed hop-up say to use .12 or .2 gram bbs. If you use .12s they will work fine, but aren't accurate enough. They tend to curve as they near the target. .20g bbs are noticably more accurate but they reduce the fps of the gun and you will see them curve down just a little. I suggest you use .20g bbs for these guns.
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8mm BB's
Aim True