Can 22 short ammo be used in a Winchester 63?

Answer 1

Depends on how the barrel is marked.

IMPROVING ANSWER: If this gun will feed the short rounds thru the magazine and action and up into the chamber property, then great. It's safe to use them.

It's always safe to shoot .22 shorts or .22 CB ammo in a .22LR gun, but many guns made for .22LR will not cycle or "feed" the shorter weaker rounds in the normal way, so then you'd have to put each round into the chamber yourself.

A lot of modern guns that will handle shorts, longs, and long rifle .22 rimfire rounds have the barrels marked simply ".22 LR" and that's a bit misleading.

Answer 2

Well, honey, the Winchester 63 is designed to shoot .22 long rifle ammunition, not .22 short. While you might be able to physically load .22 short ammo into the gun, it's not recommended as it can cause malfunctions or damage to the firearm. Stick to using the right ammo for your gun to avoid any unnecessary headaches.