Once upon a time, it was recommended by some holster makers, by many a firearms instructors, and by several uncle Billy Bobs to wet down a leather holster and put you gun in it for awhile to form the leather. Never quite understood why someone would want to do to combine wet leather & steel. I used to use a little bit of Neatsfoot or Mink Oil on them and let that facilitate the forming. Nowadays it seems holsters are much better formed right out of the package but I still test them & break them in a bit before carrying them (off the range or outside the apartment) holding whatever gun they are made to hold.