I don’t use the same exact recipe but I have tested the crap out of 165gr sst with LC brass and RL 15 in my armalite AR10. I think what I’ve done with my combination will be a good starting place for you with the 150’s. In the Hornady book after 308 Winchester loads is a section for 308 service rifle loads. They are reduced from the standard 308 loads. I use the 168gr data for my 165gr, you could use the 155gr data for your 150gr. I have found that I reach my pressure limit at the max loads listed in the service rifle section, with varget and rl15.


JTD