Well, after using 777 pellets along with Hornady SST 250 grain bullets the past few years, I made the switch. I had problems with the bullets not expanding in deer and leaving zero blood trails. So, after reading some on IW and other spots, I picked up some Barnes Expander 250 grain bullets along with some Blackhorn 209. I went Saturday to sight it in. Wow, what a difference that 209 is in my TC Triumph. I shot 8 times (dead on at 100 yards) without swabbing/cleaning my gun. The 777 pellets caused me to clean/swab the barrel between shots. So much cleaner to shoot. The Barnes bullets are really tight going down the bore, but so were the Hornady. I'm hunting late season, so I haven't hit a deer with one yet, but that's my next test, which will seal the deal if they open up and leave me a red trail or knock the deer down. Feels good to get to this point.