I've been trying the Precision Delta hbwc with Match lube and having issues with them starting to keyhole at 50 yards. The regular lubed ones don't seem to have as much of a problem but gum up my dies. I have been loading them in federal brass, cci small primers and 3.1 gr of W231. With overall length of 1.16" and using Lee factory crimp. I'm shooting them out of a s&w 15-6 with a 4" barrel. My chrono shows about 740 fps. I'm getting about 6.5" groups with the match lube and 4.5" with the standard sticky lube. I would really like to make the PD hbwc with match lube work. I'm new to revolvers and reloading. I really need to get these dialed in at 50 yards for PPC. Any help would be greatly appreciated.