It's not strange at all. The older Smiths had tight chambers, and shot the better for it. I had a M18 Combat Masterpiece that we referred to as "the mallet gun" as you needed a mallet to get the cartridges in and out of the chambers, but that thing would SHOOT like it had eyes of its own. Just about any ammo would shoot bugeyes in it.
A couple of months ago, I bought a new 4" 617 (the modern equivalent of the same basic revolver) and ammo just drops into it, and falls out of it easily, too. AND, it doesn't shoot nearly as well as that Model 18.
I'd say, just clean it frequently, and enjoy the good accuracy it provides, and quit using that excrement ammo. Use better ammo. Period.
