.300 Remington Ultra Magnum
A medium-range hunting load using a hunting bullet designed to expand at low velocities.
According to Hornady's manual, H4198 (a Hodgdon Extreme Powder) gets into the 3200 fps range.
Hornady 212 gr. ELD-X: This reaches the lands at a COAL of 3.865", but I need a COAL of 3.600" to fit in the magazine. That means these bullets will be .265" away from the lands. I may need to experiment with single feeding these.