Just printed out 9mm data on both HP38 and W231 from Hodgdon' Data Center.
http://data.hodgdon.com/cartridge_load.asp
The two charts that I printed are identical except the powder designation. Bullet for bullet, powder weights, pressure, etc are the same.
It looks like to me that in todays powders, HP38 and W231 are identical.
http://data.hodgdon.com/cartridge_load.asp
The two charts that I printed are identical except the powder designation. Bullet for bullet, powder weights, pressure, etc are the same.
It looks like to me that in todays powders, HP38 and W231 are identical.