The Glaser Safety Slug is a recommended choice for use in a .38 revolver with any barrel length. Owners should be aware that keeping the chambers and frame interior 100-percent free of oil and solvents is necessary when carrying Glasers. The CLP can leak into the primer pockets causing the round to become defective and not fire. This is also important for consideration on all rounds that are being carried for self-defense purposes, but Glaser isn't known for particularly good sealing against such incidents happening. Owners should also consider carrying two Glasers as the first rounds to be fired, and JHP loads for the rest. This is because JHP rounds have better penetration in case an attacker hides behind an object such as a doorway or sheet rock wall that a JHP bullet can penetrate.