There is another way to take the existing BLM divided by 128 and multiply to the current VE value to get the corrected VE value. So if your log reveals a BLM of 138 youre shooting for 128 and your VE value is 45 then the corrected VE value should be 48.5

ie 138 / 128 x 45 = 48.5

Been a while so someone correct me if i'm wrong, math isnt my best friend.