NE450,

Where do you purchase the Superior brand ammo? Is it a Canadian loading or from OZ?? I love my various 9,3x74r's and reload for them using several different powders.

Have you tried IMR 4064? It has been about perfect in four different 9,3's I've had or still shoot.

Your chrono results are not dissimilar to my results. I think anyone reading your post could bank on your data. I tend to get a bit better velocities with the 4064 using up to 286 Gr Noslers and Woodleighs, and have had no signs of excessive pressure. It has been my best accuracy powder, with the most consistant velocities. I did get about 2340 fps out of factory Norma 285 Oryx ammo on average...a bit hot.

Drillings & 9,3x74r double rifles...? What a man of good taste!