Pretty much the same as any other revolver or semi-auto.
You could go to proofhouse.com to look it up.
Find a book or website that has sn data for it and look it up
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IIRC, Cornell Publications has what you want.
It usually says right on the barrel. Single shot / single load pistols are pellet pistols. Most BB guns have a reservoir for the BB's. There are a few that shoot either a BB or a pellet. You will have to look at the instructions or the display box to see what it says. Pellet pistols are more accurate than BB pistols. Most BB pistols will say .177 BB. Pellet pistols will say .177 Cal and not say BB.
If you mean you don't have to cock after every shot, yes there are pistols like that. But there is no firearm you don't have to cock at some point.
Yeah they are like the kimber of the airsoft world
Most use the .68 caliber "normal" paintballs, like the TPX and the Tiberius arms 8.0. However there are several, like the Kingman training pistols and some rap4 pistols, use .43 caliber paintballs. Also the Tiberius 8.1 and 9.1 can shoot the First Strike paintballs.
Pistols.
Proofhouse.com has sn tables you can look it up on.
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