My dad and uncle have been killing elk since the eighties with 150 partitions in 270s. I’ve killed a few with monos in the 270wby, 130 Etips. Only noticeable difference seems to be less bloodshot jello with the monos. Otherwise they both wreck shoulders and keep steaming. I’ve recovered one of 4 Etips and they’ve probably caught 3 or 4 Partitions over the years, roughly 25-30 elk sample size.