[Paladin2]

Is 22LR handgun ammo or not?

[SwedeBoy2]

Not sure exactly what type of verbiage is used in the Bill, But Yes. .22LR is Handgun Ammo as is 30-30, .308, 45-70 and many others. Since Thompson Center Chambers many different normally thought to be Rifle calibers in Pistol Barrels.

[MSF BU]

Yes it is. Shorts, Longs and LR can be used in many .22 pistols.

[Wallop the Cat]

"Handgun ammunition" means ammunition principally for use in pistols, revolvers, and other firearms capable of being concealed upon the person, as defined in subdivision (a) of Section 12001, notwithstanding that the ammunition may also be used in some rifles.

[absalom01]

Yes, under this law it is.

Which see:

(a) “Handgun ammunition,” which does not include blanks and
ammunition designed and intended to be used in an “antique firearm”
as defined in Section 921(a)(16) of Title 18 of the United States
Code, meansany variety of ammunition in the following calibers,
notwithstanding that the ammunition may also be used in some rifles:
(1) .22 rimfire .
(2) .25.
(3) .32.
(4) .38.
(5) .9mm.
(6) .10mm.
(7) .40.
(8) .41.
(9) .44.
(10) .45.
(11) 5.7x28mm.
(12) .223.
(13)
(12) .357.
(14)
(13) .454.
(15)
(14) 5.56x45mm.
(16) 7.62x39.
(17)
(15) 7.63mm.
(18)
(16) 7.65mm.
(19) .50.

[Vendome]

Goes into a Ruger Mk II and above.

[4Runner]

Ruger makes a .22 cal handgun that comes with two exchangeable cylinders. One or the other of them accepts the .22 Magnum load and the .22LR (long rifle) load. Answer is yes.