I think a 125 gr. ballistic tip would work if you pick your shot. It will open up faster then a heavier bullet, but for a side lung shot, it will work. But of the 2, I'd stick with the 130 gr. TSX.

My personal choice would be a 150-165 gr. bullet. Deer are not especially had to kill and a quality cup and core bullet of 150-165 gr. works well.