Muzzle loader issues

The Hornady 300gr SST and the Barnes 290gr bullet both work perfectly in my two MLs. I shoot a TC Encore and a CVA Accura V2 LR. Both guns group these two bullets into an inch at 100 yards with 110 grains of Blackhorn 209 started with a Federal 209A primer. Always check your loads with different primers. Seems to make a big difference to my rifles.
I am also a firm believer in the 300 grain hornady SST . I use them with 110 grains of 777 pellets in both of my CVA's . Very accurate hit hard and drive deep .