RE: 300 ultra mag shooters
About everyone I talked to has had horrible luck out of the Scirrocos. Including myself. I do know 2 people out of maybe 10 that got them shooting. Very finicky on bullet seating depth. What a waste of $35 dollars for factory shells. Then a waste for 3/4 pound of H1000. Then a waste for bullets. Then a huger waste of tons of time trying to get them to shoot.
What I have seen is the 200gr bullets seem to shoot the best out of these 300RUM' s, and I have had two. Stick with the Nosler Partitions.