One of the side effects of wet molding is a consolidation of the leather fibers, which “shrinks” the holster. If the fit is too tight when holstering your pistol the first time, don’t force it. If you do force the firearm into the holster, it may be very difficult to remove. Instead, follow these simple steps to break in your new holster using a process called blocking:
1. Place the unloaded firearm in a plastic freezer bag, or cover it in 2-3 layers of plastic kitchen wrap. Do not cover the grip.
2. Insert the bagged/wrapped firearm slowly into the holster, gently twisting it side-to-side to minimize tearing of the bag/wrap.
3. Once the firearm is completely seated in the holster, twist it about 1/16” in both directions 6-12 times.
4. Allow the bagged/wrapped firearm to sit in the holster for about 15 minutes.
5. Remove the firearm from the holster and remove the bag/wrap from the firearm.
6. Insert the unloaded firearm into the holster, which should now be snug but not loose. If it is still too tight, repeat the above steps until the holster is broken in to your satisfaction.
An alternative method is to take two sheets of wax paper, wrap them around the parts of the pistol that go into the leather, shove the gun in, and leave it overnight. KEEP THE WAXED SIDE TOWARD THE LEATHER, NOT THE GUN. This process stretches the leather just a tad and leaves a tiny amount of wax, not enough to soften anything.
If one treatment doesn’t get things where you want them, a second one surely will, and then leave the handgun holstered for a couple of days, minus the wax paper, just to make sure. You can view this method on YouTube