Thread: Cases shorter than max trim length (pistol cal) - Does it matter?

Originally Posted by thatguy

Hi all
Max trim length is 1.380” for 454 casull. Most of mine is around 1.375” (never trimmed, fired 3-5 times).
Does it matter or just crack on?
It goes in a Rossi 92.
Maybe you will know @grandpamac

Greetings,
The Casull is a rimmed case so does not need the case mouth for headspace as many auto pistols do. It does need even case length to get a consistant crimp. The crimp serves two purposes the first is to prevent bullet displacement during recoil. With your Rossi the bullets can be driven further into the case without a stout crimp. The second is to get more uniform ignition and accuracy. This is especially important in revolvers but perhaps in your Rossi as well. The actual length is not important as long as they are all the same length. Others will have first hand practical experience. Please add your evperience.
Regards Grandpamac.