RE: Sabot Slugs
Depends on what results you are expecting.
Assuming you are using a fully rifled barrell. For flat trajectory and distance, I would go with #1- Remington core-lokt ultra, #2- Winchester partition gold, #3 Hornady SST. The Hornady SST will have the lowest recoil due to a 300gr slug. Rem. & Win. has 385gr These slugs (bullit's) are in a class of their on. To keep from leading the barrell any of the others should work. A good all around compromise is the Remington copper solid.
Only my opinion