I shoot the 777 pellets. Your right in that the literature that comes with the pellets says not to exceed 100 grains. It also states that some rifle manufactures say you can shoot over that. My owners manual that came with my T/C Encore says I can use three pellets or 150 grains safely in my gun. The gunsmith where I bought it said it was safe and to make sure I was on good terms with my dentist as it would knock my fillings loose. I've shot it about 10 times with the 150 grain load of 777, but he was right. Jars the snot out of ya! I settled on the 100 grains for now. If I go out west or hunt the plains I may re-sight with 3 pellets but for now, I'll stick with the 2 pellets. This is probably clear as mud now, but I thought I'd add my two cents.