Welcome to the team! My barrel is 8 twist and shots the 120ttsx well. I was thinking the same with the Hammers, have some 124s to try out soon, wicked looking pill!
I would say that 2213 will be fine as it is near the burn speed of 4831 which is known to be a good powder for 6.5s in general, might be a little slower than what could be achieved with superformance or RL26. The 6.5 PRC seems to be very easy to load for with most combinations of pills and powder. Give it a go and let us know how you get on. I will probably put the hammers in front of rl22 as I have a couple of tins I am not using for any other cal.
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