BH209 in mine.
110grs BH209
300gr rem HP .458
Orange MMP Sabot
CCI 209m
1 1/2 2 inch groups at 150 yds out of my gun. Your mileage may vary. BH does need a tight fitting sabot and strong primer for consistent ignition. Mine fired fine down to 10 degrees last year and accounted for three whitetail deer.
I do a full cleaning a few days before the season starts mid Nov run a couple of shots thru it to verify zero and don't clean it till the season is over for me. Either tags are filled, freezer is full or the season ends on Jan 1. Some times its when I get burnt out on the processing of them.
DC