Re: Big 338 powders??
Retumbo getting close and you can get some good loads with it but the others are way to fast for this cartridge with 300's. You will not get top velocity with powders faster than Retumbo. Look at a powder chart and pick out the slowest ones on there. If you can find any H-870 it is very good. H-50BMG, H5010 and the slowest Vihtavuori powders from 170 and slower. I haven't tried US 869 but it may work.
Predictions are difficult, especially when they involve the future
Last edited by Long Time Long Ranger; 01-11-2011 at 05:10 PM.