That will be great for break in. Just watch your throttle, keep it in check. Depending on your altitude it may spin that prop over 7500rpm static. The idea of a break in prop is to keep engine load low but not to go so small that the engine over revs.

Scott

to wolf65,
I have my DL on a H9 260 I think it was 14.6lbs with half a tank of fuel last time I weighed it. I'm just starting to hover some and it adds new meaning to "punching out" of a hover. I have a TBM 23x8 on it now, so it's a dog, but if anyone wants to vertical drag race, I can throw the JXF 22x8 back on and there isn't much that would out pull it.