I tested RL19 loads using ETips in my 300 WSM. Accuracy was acceptable (average for 5 3 shot groups = 1.47" (.95", 1.98", 1.32", .93", 2.15") - might have had one flyerin the = 2.19" group (1st two withen .5" of each other). However, no load went over 2900 fps and the "accurcacy load" was just over 2794 fps (30-06 velocities in a magnum rilfe).
Conclusion - accurcay was good, velocity was poor (longer bullet = less powder). Note - this was done without trying different bullet seating depths - bullets were seat 0.100" off the lands (as per most common recommdendation found on the Nosler Reloading forum).