.22 pistol and rifle ammo help ?

when to the store to buy some .22 ammo for my 10/22 ruger and the guy was kinda of a dick , I asked for some .22 ammo to see what they had he kept telling what type i didint understand onther then myabe the brand? then he said for a pistol or rifle ' i thought all .22 rounds could be fired from anny... show more when to the store to buy some .22 ammo for my 10/22 ruger
and the guy was kinda of a dick , I asked for some .22 ammo to see what they had he kept telling what type i didint understand onther then myabe the brand?

then he said for a pistol or rifle '
i thought all .22 rounds could be fired from anny .22 rifle or pistol....

growing up we had both a rifle and pistol semi and a revolver
we used the same .22 ammo on all 3 weapons with out a problem..

do they know make them only for each one?
i didnt buy anny i thought that was odd .

I wanted to make sure what i need and if its so to this day i use the same ammo on all 3 have i been doing this the wrong way?
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