1. dontstrokeme

    IMR4064 interchange in WSM?

    I am running 140gr .277 cal in my 270WSM, with the shortages around lately I ended up with 2 lbs of IMR4064 but can not find RL22. I was running 64 of RL22 and getting 3130 MV. Looking in Nosler #5 it shows 300WSM with IMR4064 60.5gr max. Also for the 300WSM it shows IMR4350 as 67.5 max and RL19...