I don’t really like heavy weights on my back. Higher reps allow me to get away with using a lower load while still building strength. I know the science behind rep ranges and physiological adaptations, but higher reps have been working well for me so far. Since I combine them with plyos, I don’t appear to be missing out on anything.
Either way, 315 is the most I want on my shoulders for now. Maybe once I reach 315 x 15 I’ll be more comfortable and will move my work weight up to 355.