JohnW - I hear ya bout Fed 215, however where I live and have lived they have not been readily available. ? Why ? I don't know.
That said, WLR/WLRM is what I use whenever possible.
A few yrs back, I ran a test between WLR vs WLRM and I saw NO difference over the Oehler. I haven't been interested enough to re-do it.
Good Luck Jerry