I also like the 140 grain for 7mm Rem Mag.

I've loaded the 140 Sierra BT and flat back, as well as the 160 Gr Sierra in two different guns. I prefer BT, unless the distance to the lands grows too large, then I will switch to a flat back bullet. IMO, 20 thousandths off the lands is the preferred starting point. I rarely get closer, but will move further away during testing.

I've used H4831 for the 140's and H1000 for the 160. I would try the H1000 first, the cartridge is somewhat overbore, so the slowest burning powders have generated the smallest standard deviation. The H4831 loads were developed before H1000 was available.

Use a LR Magnum primer.

I don't really know the velocities are that spectacular. As I said, the cartridge is somewhat overbore, so the powder charges are quite a bit more than say a 7-08 or 7x57 with relatively little added velocity. Still is a favorite of mine though. It was my first reloaded cartidge, and the only one I have duplicated with 2 different guns. I would have to look at my data when I get home to refresh what my velocity is. If I recall, it is not significantly different than 3100 fps with the 140 BT. Note, I usually don't load to highest velocity, as much as I do the best grouping, lowest std dev.

I just can't bring myself to get rid of either gun, it's even harder to decide which when they get to go hunting and when they have to stay home!

I may get slammed for my bullet choice, I am about the only one in the world who prefers non-premium bullets. Works for me. Some day I may see if someone can convince me to change.