Here’s a great load for the 300 RSAUM .. this is through a Rem700 Sendero with 26 inch barrel
Hold honest 3/4 inch groups at 200 from the bench.

Hornady 178 grain Amax, Fed 210m (match not magnum) primer, Remington case.
Reloader 17.. in the following weights:
60 Grains – 2900 FPS, 60.5 Grains – 2950 FPS, 61 Grains – 3000 FPS, 62 Grains – 3100 FPS

Here’s the best part.. NO SIGN AT ALL OF OVER PRESSURE…