They've been a mix. Across several 9mms I got the coating fouling. Not leading, but visible red or copper colored deposits on the lands and grooves. This corresponded with a POI shift.
I tried them in .41 from MBC also, and results were dismal. I got leading also with those. I think the coating might have been defective on that batch as it was flaked off on bullets I recovered from a clean snowbank. I have not tried them in .357, as wax lubed serve me well and I feel no need to use coated and likely encounter the same problems