Thread: Subsonic 308 project

Originally Posted by Cooper

Any more info on loading these? I am also playing with the cast bullets, last week I tried a few 200gr with 10gr of trail boss, 66mm COAL and a 3mm drilled flash hole and some federal magnum primers and they shot around 1150fps with 2 a bit higher, looked like one keyholed on target.
Rifle is a 16in barrel Tikka.
At 66mm chambering a round in my rifle is still swaging rifling marks in the bullet however I shortened it up so it is still easy to chamber. Interested in what OAL everyone is using?
Is anyone using any fillers or having issues with inconsistent velocity?

...and don't use fillers with Trail Boss as it's not position sensitive. Does not have to be stuffed back up against the primer hole.