There were reports of non modified early L frames having the primer blow back into the firing pin hole which was to big and causing the gun to freeze up. If I recall correctly, it was only with light 125 grain .357 ammo but no problems with heavier .357 bullets or any weight .38 ammo. I knew a couple of friends who owned the guns and they never sent them in for the recall and they shot all weight .357 bullets with no problems and if one tried the lighter weight bullets and no problems, the gun was good to go.