Need help approximating .380 Mk IIz load with Unique

[browningautorifle]

It depends on what you're actually going to shoot it out of. The S&W revolvers will take anything but top break revolvers aren't the strongest...but I never had trouble with the Webley. Rather than spout info only to be asked where it came from, here's a current thread that mentions your cartridge right away. I too use cartridges of the world as one of my reference. If you have loads safe for the 200gr, they won't blow anything up with the lighter bullet.

.38 SW load data