I'm trying to find out were or if I can compare the burn rates between Retumbo and RL-22, does anyone know were I can find that data? I am trying to duplicate Hornady 162 gr 7mm BTSP factory ammo. They just told me that RL-22 has the closest burn rate compared to there factory blend that isn't available in stores. But I load for another 7mm and would like to use Retumbo. Just not sure if it would what the results would be.