My first Rohrbaugh was purchased in the 2005 era, it was serial No. R6XX it had a Deer Park stamping. I ordered the R9 when they were in Farmingdale, then they closed for the move.
Welcome Jim, the ammunition is all over the place, and I believe the cause for many pistol malfunctions.
I've limited the ammunition I use in the R9 to Gold Dots and Silvertips.
I went shooting last night, brought my very trusted S&W model 66-1 revolver and had some misfires with 38 specials, these were however store bought reloads, but I never had that many misfires.