I`d check thier price on H4350, for that 120gr bullet.

In the 22-250,.243 and the .308 I've had results from good to fantastic. The so-so results however were bullet quality related.They were not great with any powder. If you are looking for good powder at a good reasonable price check out wcc844 and wcc846 A number of us have used both with fair success. roger

I didn;t like any of the 4064 powders in the 6.5x55 with 120 grain bullets. My choice is:
IMR-4895 From 34.9 grains to 43.0 grains
Remington 9-1/2 Primer

As for burning rates:
Faster
150 W-748
*151 IMR-4064
152 Brigadier 4065
153 AA-2520
154 N-202
155 RL-15
156 AR-2208
157 N-140
158 R-903
159 S-341
160 TU-5000
161 Varget
162 BL-C(2)
163 N-540
164 Big Game
165 N-203
166 H-380
*167 AA-4064
168 R-907
Slower