Things You'll Need
Instructions
Remove the gun from the holster.
Wrap the gun in a plastic bag slightly larger than the gun. Close the plastic around it so that it is completely wrapped.
Slide the gun back into the holster while it's wrapped in the plastic bag.
Leave the gun holstered for up to 12 hours before removing it.
Unwrap the gun and return it to the holster, checking for an easier fit. Repeat the process if it is still too snug.