I think. Remington Premier Core-Lokt Ultra Bonded Sabot Slugs. I shoot the 385g 12 gauge 2 3/4"', my 11-87 loves them. I am also very confident with these rounds. I started having a panic attack when my local gun shop told me they were discontinued. I have 3 shells in the safe. I did find them online and bought a dozen boxes, but most places (including the big stores) said back-ordered or were not available. Just a heads up for those who want to keep shooting these rounds. I ordered mine from hinterlandoutfitters.com I Binged (<---is that the correct term?) "PR12CLU" and "remington" to find them.