As stated above your straight walled 38/357 cases won't need lube in a carbide die.

Making your own lube is easy and it smells a lot nicer than the bought stuff. For a few £s you can get a small bottle of Lanolin and the gallon of Isopropyl alcohol (make sure it is 99%+ and not one of the lower concentrations), all you need is a small pump spray bottle (look under your sink, I bet you'll have one in there somewhere) and you'll be good for many 1000's of rounds.

And if the worst hap-pens you can always drink it and die happy but blind.