Not sure if you know this or not, but I have made some low power loads using modified 30-30 brass and cast boolits.
You can do the same with 38-55 brass which is available, but will need to be trimmed to .375 length.
not quite the same as the real deal but it will keep you shooting until you find some .375 brass/ammo.
If you decide to go that route you will need to reduce the powder and load as the brass is not as heavy as >375
Edited by Blanco (12/24/15 09:53 AM)