An imbalaced or off center nose requires more stabilization; its even dicier with a long, unsupported nose, which the 358429 has.
The WFN often needs more speed than the LFN and his OWC designs are even more range limited, this due to BC. A std. wadcutter, even more so.
This is why I recommend nose first sizing, for everything.
I suspect its a stripping on the rifling engagement or base deformation as the issue, all else equal.
The Thompson bullet is pretty similar, but uses a gas check.
Heat treating or increasing base hardness cuts down on the stripping and sized correctly, decreases base deformation and increases accuracy, which is what a gas check does, primarily.
