Can you shoot a regular .22 shell in a wmr rifle?

No, you cannot safely shoot a regular .22 LR (Long Rifle) shell in a .22 WMR (Winchester Magnum Rimfire) rifle. The .22 WMR cartridge is longer and has a higher pressure than the .22 LR, which can lead to unsafe conditions, including potential damage to the firearm and injury to the shooter. Always use the appropriate ammunition specified for your firearm.