They will tumble in flight and won't hit the target nose first.
The warnings about excessive leading are true. You want the bullet to fully seal against the grooves to prevent blow-by. A lot depends on your barrel, but that .002" might be enough to cause the leading.
In general, as you probably know, you want lead bullets to be a little oversized compared to their jacketed counterparts, not undersized.
You can probably push one of those bullets down the bore of your barrel quite easily with the proper dowel and then measure the actual bore size. You will also be able to see if the lands are deep enough to stabilize the bullet.