.38 Smith & Wesson, Colt New Police - Manufacturer Loading Data

Bullet
Type
Primer Case Trim
Length
C.O.L. Grains Vel. Press. Diam. Source
    145 gr  
(CPB)
 WIN WSP  HP-38
(Hodgdon)
 WIN  0.765"  1.200" Starting:  2.2 gr       0.359" Hodgdon
Max: 2.5 gr    
    145 gr  LEAD
 WIN WSP  231
(Winchester)
 WIN  0.765"  1.180" Starting:          0.358" Hodgdon
Max: 2.6 gr   11,500