I like the RL7 a lot. Great for the 45-70 and 7.62x39. I also use it in the 223 and 308 for light bullets or mid-range loads.

Here's a load with the 308, 155 Scenar, and 38.0gr RL7. 2680 fps and sub-.5 moa at 100 yards.

[Linked Image from i.imgur.com]