BB,
The collet cup sabots are very expensive for their stated purpose. Accurate, but expensive.
There are other options for slugs. SPW load components are available from slugs r us.
BPI sells a Dangerous Game Slug which is basically a heavy slug with attached wad. 1.125 ounces. Can be roll or fold crimped. I used the fold crimps.
BPI also has the RSS sabot available for sabot slug loads. Use straight wall hulls like Fed or Fiocchi for best results, and bullets of .510 to .515 diameter. Otherwise, the sabot will not engage the rifling for best accuracy.
For deer, boar, and black bear, stick with Lyman 525 grain slug. Just my two cents.
St762