I will be experimenting with several not on your list...I just had my .308 rebarreled to the 6.5 CM and have some Hodgon Super Powder on order, if it ever gets shipped..On hand for trials I have RL-17, RL-15, TAC, and W-748...(all of which there is current data),,,The H4350 has a great following, but not available locally yet...
Hopefully the Super Performance won't be delayed much longer... I will book mark this thread and get back to you in a PM when I get some results, if you would like...
I have heard a lot about R-17 and H4350. However, I can't find any. Today I did find some IMR4350 so I bought that. I do have some Superperformance powder I bought a couple of years ago by mistake so I can try that also.