I doubt your RL26 load is overly hot. Quickload suggests a 140gr Amax @ 3.21", 54.0grs RL26 for 3025 fps (26" pipe) is only producing 58,000PSI
It produces amazing velocity in 6.5x55, 270 Win, 7mm Rem Mag, 300wm
414 is a good powder and versatile over a wide range of cartridges. I like it a lot for mass production of hunting loads as it meters great. I don't find it great for target loads as the ES is wonky as most ball powders tend to be.
I'm slowly gravitating to IMR4831 from the H4831, it's not hard to get ES down to single digits with almost the same velocity as the H4831.



























