1. Use jags with 10-32 threads, not 8-32. Less likely to break off and remain in barrel.
2. Use the next size smaller jag and double patch it; ie, 45 in a 50, 50 in a 54, 54 in a 58, etc. With a double patch, you get 4 wipes by rotating to a clean face.
3. Cut 4 vertical grooves in your jag 90 degrees apart. It gives additional gripping power on your cleaning patches.