Looks like a bit of neut burn on the leaf finger tips. The browning on the serrated tips looks more like a beginning of cal def, as it’s more kinda trying to spread into the leaf. But we need to know neuts,/ ratios, light type. Day / night temps and RH, grow space (tent size and height) type of light. Wattage, distance, fan positioning, (to rule out wind burn)Those tips look more light or nute burn to me vs a deficiency but I could be wrong. I am curious as to what it is when you figure it out
They do still look healthy besides some leaf tip issues though!