Method to make a nylon holster fit better
I tried this last night and it worked great. I have an inexpensive shoulder holster that is made for snub nose revolvers. The gun rides horizontally in the holster and there is a retainer strap with a thumb break tab that goes around the hammer.The problem is the gun does not fit tight in the holster. The nylon sleeve of the holster lets the gun move up and down to much and if I adjust the retainer strap so it nice and tight to the hammer I have to run the snap of the thumb break down the side so far the end of the tab does not stick out past the gun to allow the snap to be opened by popping it with your thumb. Looking at the gun in the holster it occured to me that if I could keep the gun from going into the holster to far, and also keep it up to tthe top of the holster it would work better.
The solution, I took some black thread and a needle and sewed a line of stitches under and in front of the trigger guard of the gun. I placed the UNLOADED gun into the holster, and attempted to get the needle thru the wall of the holster below the trigger guard. I started in the middle of the trigger guard. The first attempt actually hit the trigger guard so I moved down a little, sewed a line of stitches across the bottom working my way around the middle of the trigger guard, toward the barrel. I followed the curve of the trigger guard up towards the cylinder and then stiched back to where I started.
The gun now sits high in the holster, and does not go in to far so the retainer strap stays tight against the hammer and I don't have to worry about the strap slipping over the end of the hammer, letting the gun fall out.
Give this a try, if you mess up you should be able to easily snip the thread on the outside and remove the stitches and try again.