Thread: .308 subsonic load development.

I have worked down from 10gr of trail boss to 7.4gr to get to 1050fps in my 18" Bergara 308 using Roberts cast 151 hp's.
I have read that 70% of max charge is the recommended minimum charge. 7.4gr is about 55%. Although I've not had any issues, should I be worried?

BTW have been using these projectiles in my blackout with 3.6gr Trailboss with great results. They mushroom well and not much runs away. Single shots are great, easy to pick and choose between sub and super where and when required.