Which Redding dies are you using? No one has asked so I will. Because I also own a Dillon 550B and I use the Redding Pro Series dies which are tungsten/carbide dies and they have been perfect for the 3 years or so I have been using them in 9mm, 40SW, and 45ACP. Just got the 10MM stuff in, including the dies, so I can provide feedback, but I will tell you this. I started out reloading 40SW, and with the redding dies I have NEVER needed a FCD, or GRX dies, etc, and my 40 SW Glocks all used stock barrels. If you're die is steel, you need case lube, from your description it would seem you have set the die up properly so that does not concern me. One more photo that will help the group, is if you could take a picture of one of your loaded up rounds sitting in your barrel with the barrel out of the pistol, so we can see how much case support you do or do not have. If you want I can try some pics tomorrow comparing the Barsto barrel I just got to my stock barrel from the G20SF. I have not shot mine yet, but will soon. FM Wanna kill these ads? We can help!