I've had very good luck with all RMR bullets except for the 147gr Matchwinner. The OGIVE on that one is a tad too chunky. Gave up on Trying to get a usable load for it. I haven't used they HP bullets, but the 115 and 124gr RN bullets are solid performers. I've also used their 230gr 45acp Plated and Jacketed bullets and they are excellent as well. They do have a backlog, but if you plan and factor in the wait time, their lag time are pretty reliable.
I've used Power Pistol, CFE, TG, and WST on RMR bullets all with no issues. I've since settled on Power Pistol for 9mm bullets and WST for 45acp ammunition. If you can plan around the delivery times, I'm sure you will be happy.
CH