Thread: Load to replicate Hornady 308 factory 150gn SST ammo

Originally Posted by Jhon

Hi, I'm looking to replicate the Hornady factory load for 150gn SST in 308. Loading for a mate whose rifle apparently likes the factory stuff. Yes he has projectiles.

Any info on loads re powder and charge to come close woukd be welcome. Feel free to PM me if you prefer not to make public

I can chrono 3 of his last factory rounds out of his rifle which is has an 18in suppressed barrel.

I have a couple of suitable 308 powders but prefer not to waste by guessing.

I have either Winchester or Federal LRP, may so have some CCI

Thks

Greetings @Jhon,
Most 22 inch barrels will give around 2,750 fps with factory loads and 80 fps less (20 fps per inch lost) or 2,670 fps from 18 inch. Check this by chronographing your mates factory loads. Hodgdon max is 45.5 grains of AR2206H for 2,870 fps with the 150 grain in the .308. This works out to about 2,720 fps in your mates 18 inch barrel. So reducing the load to about 44.5 grains should be near matching velocities for him.
I recently chronographed 44 grains of AR2206H with the 150 grain Hornady Interlock in the 20 inch barrel of my .308 which produced 2,670 fps. This was using Winchester cases same as Hodgdon and Hornady cases are about the same weight. The 0.5 grain less powder and the 2 inches more barrel are close to balancing things out. Begin with the start load of 43 grains of AR2206H and chronograph. Then calculate how much extra powder you need to get to 2,670 fps or whatever your mates rifle is giving at 50 fps per grain of powder and work up to that chronographing as you go. You can use the same technique using other powders. Best of luck.
Regards Grandpamac.