Thanks guys .I use 4064 for my 308 178 BTHP 37.6 Dr and love it .and here where I live in Alberta nobody has H100V,RL22,win sup780 or 4000MR so I was looking for load my 300win mag with IMR 4064 .and 178 gr8.to see how it works hehe Thanks for all info
4064 will work. Probably quite accurate, too. Just saying it isn't optimal for power. But ya can't shoot what you can't buy.



























