Can I use cast bullet loads for jacketed bullets? Can I use cast bullet loads for jacketed bullets? September 4, 2019 Michelle Gallagher No. Load data should be as specific as possible to the bullet used. 3 Newer How long will my handloads last, if stored in a cool dry place? View all posts Older I have the same barrel length, use the same powder charge and bullet as you do in the manual, but my velocities are different.