I use 32 ACP in my 32 mag and solid frame 32 S&W revolvers because:
1) I have a lot of 32 ACP that I either traded into cheap or were partial boxes that my local gun dealer GAVE me as he could not sell it.
2) In the case of the 32 S&W; There is no defense ammo available for that caliber, and the 32 ACP has several fairly hot hollow point rounds available, that make low recoiling defense ammo for my wife to use that does not rattle her with recoil to where she is afraid of it like the same gun with 5 38 special hollow points does. This makes a comfortable 6 shot gun for her, that will shoot minute of possum or Raccoon, both of which we have plenty of nasty ones hanging about as we live in the woods. I use only fresh new ammo for this, and the old stuff become practice ammo.
3) I CHOOSE to............
I would not use it in a break top, but of course, since S&W, the makers of the best quality break tops has said not to shoot ANYTHING in any of their vintage break tops, I would not shoot any old break top AT ALL.
Just to stir the pot a little, have any of you used 38 S&W factory ammo in your 9mm revolver? (save me from your protests that it won't work, because it does and I have done it) Factory lead 38 S&W will go right into the 940 S&W chambers for 9mm and work like a light load. They are low pressure, soft lead bullets. and work just fine. Why do this? Again, many times a partial box of 38 S&W becomes available, and this is a good use for it. Why not? No moon clips required.
Louie