Hi Mac, I've been playing with a 7mm08ai using 2209 and like yourself have a very accurate mild load but cant get enough powder in the case to reach the next accuracy node'.
After much research I finally came across some info recommending H414/W760. These two are the same powder just under different brands. They have a similar burn rate as 2209 but are spherical so can get more in the case.
I got some H414 and have gained 250fps but more importantly have found the next node.
I don't know if you would get the same results in your Creedmore but could be worth looking at.
WJ
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