I'm over on the West side of Iowa but me and brother Ornery Orr are dirty stainless RATS now...
All my match guns shooting BP are stainless.
Member of NCOWS Nebraska Territorial Rangers and we shoot at "Gunfire in the Hills" at Logan, IA.
Ft. Des Moines Rangers might be closer for ya. That's near Indianola. Hard to beat that shoot.
Glenwood is a good shoot, but again, probably too far for you.
Let me know if you need contact info.