I know I have been beaten to the answer but this is what I send out with every holster I make...
Holster break in period and care.
Do not apply oil or softeners of any kind to break holster in!
If the holster is too tight carefully unload your pistol and wrap it with 2 layers of wax paper (wax side out) and place pistol fully into the holster, let it sit this way overnight.
Next, work the pistol in and out of the holster a few dozen times making sure to fully seat the pistol in the holster.
Remove the wax paper and try the fit, if its still to tight, repeat the process with 3 layers of wax paper.
Continue this process until you get a close fit, just don't over do it as it is difficult to un-streach leather.
Once the fit is close remove the wax paper and do a few dozen practice draws.
Leaving the gun in the holster when not in use will help the break in process.
Your holster should now allow you to wear it and finalize the break in.
To finish break in wear the holster and repeatedly draw the pistol till you are comfortable with the draw.
A properly broken-in holster should retain the weapon yet still release the pistol for a smooth draw.
I normally only have to do the wax paper method once then just wear and draw, re holster the pistol.
Hope that helps