well that's a hard one! they tecnicly can be reused but there soo cheap its not worth the jam of ur gou
The problem with reusing bb's is that they gather dust/dirt from the first time they are shot and hit something, which is then deposited in your gun. They also might get slightly misshaped, further causing problems. Both of these things can cause damage to you hop up chamber, and eventually lead to jams because of dirt build up in the barrel. If you are using a tight bore barrel I would say absolutely don't reuse bb's. If you have a good hop up unit I would also say absolutely don't reuse bb's. If you have a gun with no hop up and a large diameter barrel (6.06mm and bigger) it should be fine though. Also, spring guns are not affected as severely, so that should be fine too.
Airsoft bbs are made up of plastic and are 6mm in diameter and are .24 cal, BBs however are metal and are .177 cal (4.5mm)
Type recommended by the maker of the airsoft.
The stinger p9 is good with .12 gram airsoft BBs or you can use .25 gram bbs but then it will decrease the range.
you can not use metal bbs in airsoft guns at all. they are not compatible because they are both built differently.
In airsoft, you can't reuse BBs, whether it's bio-degradable or not. If a BB already being shot from an airsoft gun, it may have beared some cracks (though its invisible with bare eyes) or change it's shape (deteriorate) . If you use it again, you can damage your airsoft gun. Bio-degradable BBs will only decomposing in a specific conditions (i.e leave on a damp/wet soil for days) and will not decomposing in a normal storage conditions.
no
yes they are very accurate
.25 Airsoft bbs can be good. Their weight is very good for accuracy and helps for a harder hit from the bbs. However, no bb is good if they are not high polish. Companies like Madbull and Matrix make good .25 bbs.
Yes
No
no
NO.