Try these:
1) Federal brass, CCI 250, 37.0 of H380, Nosler 55 grain BT
2) same brass, CCI 200, 39.5 of WW760, same bullet or Sierra 55 grain BTHP
3) same brass, CCI 200, 34.5 of H4895, Speer 52 grain original HP
4) same brass, CCI 250, 38.0 of H380, Speer 52 grain HP
5) WW brass, CCI 200, 35.0 of IMR 4320, Nosler or Sierra 55 grain BTSP
All should be considered maximum loads; work up. Check the Hodgdon #25 and #26, and the WW #14 booklet.