Was raining today, so the ProChrono didn't get brought out, but I think the RL26 may indeed be the ticket. Hornady brass, CCI200, and the 143ELD-X over 47 and 48 grains both shot around a half inch at 100yds. No pressure signs at 70F. Bergara HMR. 2.855" OAL. Not bad for a used factory rifle and cheap brass.
Got around to shooting this load over a Magnetospeed today. Makes 2,760fps from a 21" barrel with 47.5gr. It'll be what I hunt this year in that Bergara. Shot it in the 70F morning with chrono and then the kids shot it later at 90F+ with no pressure/accuracy problems, so it's apparently not at redline.
