Thread: Recreating a Hornady 139g SST for 7mm RM

I'm trying to simply copy the 139g factory rounds I use...139g Hornady SST for 7RM.

I just pulled a projectile and measured the charge: 77.5 grains of powder in the factory round.

I've checked and rechecked and I measure 77.5 every time. But on every chart I've seen 77.5 is way into the redline. It looks like you get a compressed load by the time you get to 75 grains.

So does anybody know what powder is this? And how much 2217 or 2213sc do I need to get the same whoomph?

Hoping somebody can point me in the right direction.