As this is a niche caliber, I too would think most folks would be shooting lead vs. jacketed. Too many other jacketed rounds one could use for hunting like a 30-30.
As an aside, never really thought of a 38-55 as I have never seen one in the flesh (and already have two lever actions), but that could be a fun rifle (Marlin, Henry....). I would certainly reload lead rounds for it were I to have one. Straight walled cartridges like my 45-70 are fun to reload and shoot!