Bear2000,
I have used RL22 and VV N160 with 139-142gr bullets in my 6.5x55 for 1,000 yard competition. If you have a modern commercial rifle (not a M94 or M96 Swedish Mauser), then start 1.5 grains below the following and work up, looking for pressure signs:
Case - Lapua
Primer - Russian KVB-7
48.0gr RL22
Case - Lapua
Primer - Russian KVB-7
47.0gr VV N160
Don