I was shooting the Ultra Mag today at the 60 yard station (since that's where I sight in at) and was shooting some 495 grain .503 No Excuse Conicals with 70 grains of Triple Se7en 3f and two 1/16th fiber wads. If your hunting situation is not extreme, such as 100 yards and under, I think this load would plant any deer where it stands. I recovered one of the conicals out of the bullet trap. While it expanded to over an inch in width, it still weighed 494.8 grains.
As for my record keeping, I keep files for each rifle in the computer and in a separate notebook. After each shooting, I take pictures of the targets and things that I find interesting or unusual. I then put those pictures into the files and explain what I was looking at. This way I can go to any of my rifles, and search out loads, and projectiles and have a good idea what to expect out of the rifle.