Joe,
There have been one or two posts here where owners deleberatly tried to limp wrist their R9 to make it malfunction and it reportedly had no effect. It seems that most R9's function well and others seem to be problems. Yours seems to be doing pretty well but if you are still not satisfied with the reliability with that ammo, look for a post Titled This is the ammo that works. There are 3 loads listed there that I can pretty much guarantee will function 100%. The only down side is that none of them are classified as "self defense" rounds.
However I think you are aproaching the reliability issue in the wrong way. Extended range shooting is inviting problems with an R9. Yours is "broke in". Now clean and lube it. Take it to the range and fire 2 full mags thru it then clean and lube it again and do the same, and again and again. I would start with a new recoil spring before you begin this procedure. Anyway, after you have done this 4 or 5 or whatever times with no jams you should feel confident that it will perform when TSHTF.
My opinions only, Mike