The locked breech of the Savage, designed by Major Elbert Searle, theoretically used the bullet's torque to keep the rotating barrel closed. I've seen conflicting reports on how well this actually worked out, but the Savage seems capable of handling any safe loading of the .32 acp.
The Remington 51 is my favorite locked breech .32. It's very well made and handles great. I have seen a broken breech block on a .380 model, but I'm not sure if it's a generally weakness in the design, especially for the mild 32.