Thread: 6.5 STW case and load development.

Originally Posted by Uplandstalker

From what I've read, in you 28" inch barrel, it could be possible to get to 3500fps with the 140gn with around 87-88gn of 50cal powder before the pressure turns to shit.

Maybe, just maybe, you could try some Matrix bullets in this bad boy

Worked up through the load increases and fire formed all the cases today, 86gns of 50BMG gets 3400fps, it stops there though, can't get any more in the preformed case at the given seating depth, should get to 3500fps with the finished case and the same bullet, will likely switch to the Berger for more velocity gain and may go to ADI2225 in search of 3600fps.