Trimming should be a rare event. The end of the chamber is usually so long that should brass stretch that much IMO it should be retired. Many chambers are .050" to .070" past the length of cartridge when new.

Naturally it is good to start with all brass the same length for consistent tension/bullet release.

Many loading manuals suggest trim length .010" shorter than standard length. I think trim suggestions were created so the uninformed handloader won't get into trouble.

Informed handloaders KNOW the distance to end of chamber. It is quite easy and will save you a ton of time wasted on trimming:

https://www.youtube.com/watch?v=JKnXJxaAw2U

To answer your question. I have never noticed any difference in any trim length vs untrimmed brass in a hunting rifle. I used to trim and occasionally made the case too short then corrected the issue. Mixed the cases and had good accuracy.




Last edited by Azshooter; 10/06/19.