Do you use them between the powder and the bullet? I assume it would be to improve accuracy.
Yes, pour in powder, and add felt wad.
There are two schools of thought concerning their usage. Some do and some don't. I believe that they assist accuracy when using hotter loads. The bore in many of the Savage ML2's are rough. It can be rough on a sabot base. The wonder wad helps to maintain sabot base integrity thereby promoting accuracy.