this info. comes from loadbook , one book/one caliber . for some reason it only shows the max load , no starting loads , for this powder . so start low and work up . I would start 5.0 grains below max . I'm fairly sure the Hodgdon H 870 has been discontinued . hope this helps Jim
nosler partition 150 gr & 160 grain ...........80.0 max
Hornady 162 gr spbt..................................80.0 max
sierra 170 gr RN..........................................80.0 max
nosler partition 175 gr ...............................77.0 max