some info on this. Take it for it's worth, do with it as you wish and good luck.
Includes the following:
This New "Remington Ultra Mag" (RUM) cartridge should be a hot selling item. Handloading 140 grain Nosler Partition bullet, load is 93.5 grains of RL-25 powder, Federal 215 primer, this load delivers around 3493-fps at 15-feet. Reduce all Initial loadings by 10% but, NO More!
For deer and antelope at long range, the 150-grain Swift Scirocco bullet with 94.0-grains of H-1000 powder, Remington 9½ primer will deliver around 3281 fps at 15 feet. "Reduce" all Initial loadings by 10% but, NO More! Slow burning powders can detonate instantly like dynamite when the load is reduced too much!
Swift A-Frame, 175-grain bullet, 98.0-grains H-50BMG powder, Remington 9½ primer, delivers around 3014 fps at 15', great for elk, moose and bears. You might feel some recoil with this load with a heavier bullet and powder charge! Reduce all Initial loadings by 12% but, NO More than 12%!