I use Dolmar branded Oregon chisel full complement chain, on a 20" B&C setup, while noodling.
No issues whatsoever regarding the chain dulling.
As a matter of fact noodling seems to dull the chains the least unless the bark is extremely dirty.
I mostly noodle oak and beech knots.
... my chainsaw doesn't clear the noodles that well. Of course tipping the bar up or down shortens the noodle length making clearence much better. But if I had a lot of noodling to do, I would buy the dolmar 6100. Supposed to be the best noodler by far out there!...
Dolmar PS-6400/7900 (and close family I suppose) are great noodle monsters.
The PS-7900 is more fun, off course - lots of power to pull extreme noodles.
I try to keep the cut leveled to the grain, makes for the fastest noodling cuts.
The PS-6400/7900 don't have troubles handling really long noodles!