I have pretty much everything from 90grs to 160gr partitons. The 115s were just from an old box that I was trying to use up that were used in a 7BR . I've already loaded tests with 140s and 162s.Not the bullet, powder, or primer I would recommend to anyone handholding for a Rem 280.
Berger 140gr with RL16 or H4350 with federal or CCI primer will most likely produce the best results