.303 British Case length

[ZeeRo7]

Alright guys, first time reloading. .303 brass out of my own gun. Case length is supposed to be 2.222, my brass varies from 2.223-.227. Its once fired. My question is will that affect my gun at all? Or should i trim indefinitely? Im new to reloading and just wanted to make sure. Also im using a Lee Loader. Cutting my teeth, all the help is much appreciated.

 

[Jud96]

Trim your casings and then neck size them once they are fired in your rifle.