FX Crown Barrel liners???

Not that I care, I'm not the guy to get concerned with other peoples business usually. But how is it legal to shoot a deer with a .30 pellet gun that has the same energy as a .22LR? Would like to know the thought process of the individuals who declare that a viable option to take a deer? Not that either rifle couldnt kill the deer but I just know how strict the conservation department is. Very surprising to me.