heavy cast bullet in .380?

[Adam Helmer]

Mr. 16 gauge,

The Lyman Cast Bullet Handbook says for the .380 and 121 grain cast bullet .980" OAL on page 264:

SR-4756 2.3 grains 662 fps. Max. 3.5 grains 927 fps.

Green Dot 1.7 grains 620 fps Max. 2.3 grains 760 fps.

Hope this helps.

Adam