I have an other thought on Why the RNL. Lead bullets are made by extruding them. They are not molded. It would seem to cost no more to extrude a SWC than a RNL. But at Walmart for example, I see Federal RNL .38 Special and maybe other brands, but no SWCL loads. In the 1980s and before, the San Diego, Cal police issued SWCL ammo and 6" model 10 revolvers. Bad guys shot by them, tended to stay shot.