lturford
Member
I picked up some HP-38 powder yesterday – I have 135 grain .40S&W Rainier Platted Bullets in the house – Rainer says to use 10% less then jacketed weights if lead info is not available – Also I believe that HP-38 and 231 are essentially the same powder – This is what I’ve found -
Per Lyman 49th
231 5.5 to 6.7 for a jacketed HP – OAL 1.085
Sierra 135 JHP
231 5.2 to 7.2 – OAL 1.125
Hogdon Powder listed in Complete reloading manual –
HP-38 6.3 to 7.0 for NOS JHP – 1.125
Reloaders Reference
HP-38 135 NOS JHP – 7.0 as the max – so 6.3 to 7.0 – 1.125
So I’m thinking I should be good anywhere between 5.0 to 6.1 with the HP-38 and I should be safe – maybe start at 5.2 or 5.5 – and stay short of the 6.1 –
any confirmation or advise is appreciated -
Per Lyman 49th
231 5.5 to 6.7 for a jacketed HP – OAL 1.085
Sierra 135 JHP
231 5.2 to 7.2 – OAL 1.125
Hogdon Powder listed in Complete reloading manual –
HP-38 6.3 to 7.0 for NOS JHP – 1.125
Reloaders Reference
HP-38 135 NOS JHP – 7.0 as the max – so 6.3 to 7.0 – 1.125
So I’m thinking I should be good anywhere between 5.0 to 6.1 with the HP-38 and I should be safe – maybe start at 5.2 or 5.5 – and stay short of the 6.1 –
any confirmation or advise is appreciated -