Do I have to trim my pistol brass? Do I have to trim my pistol brass? September 5, 2019 Michelle Gallagher Not as a general rule. However, keeping your brass all the same length will keep your crimp uniform. This will help to keep pressure and velocity more in line, and is certainly an aid to improved accuracy. 0 Newer I go on fishing trips each year in Alaska, and want to carry my .44 Magnum in case of an encounter with a bear. What load do you recommend? View all posts Older Why can’t I shoot all your listed .45 Colt loads in my Colt SAA and replicas?