Still fighting the Sendero in 7 RUM. It won't shoot the Berger so I've dropped to a 150 gr. Swift Scirocco and a 150 gr Nosler Balistic Tip. My five shot groups with US869 is only showing an extreme spread of 13 fps and a standard deviation of 7. This should be some great loads but my group sizes are still running just over an inch. I had hoped for better. Any ideas?