I know what you mean. I am a little wary myself. I see velocities quoted with the 6.5SAUM that approach/rival the .264WM. Knowing the SAUM case has a little less capacity than the Win Mag case how is it possible to reach the velocities and run lower pressures?

I am currently running a .264WM and get tickled when I see 3200fps with 140s. I don't have near the experience of most here but to see Pat say that he is getting the same speed with slightly less powder and 10KPSI less than a .264WM makes me question some math somewhere.

Originally Posted by scenarshooter
Originally Posted by prairie_goat
One other thing to add to the mix is that the 6.5 SAUM rounds have not been pressure tested. I wouldn't be surprised to see it's velocity drop a bit if that were to happen.


[Linked Image]

How's this for a pressure test?

This load drives a 139 scenar at 3150fps. The barrel has 2100 rounds through it, and still shoots sub .5".


Originally Posted by crazyhorse

George Garder replies

"6.5x284 to get 2950 out of the 140 is running in the 68,000 PSI range


6.5 SAUM is getting 3100 with the same bullet at 55,000 PSI


There is your difference.


Russ