Using Dillon 1050, mark7 and Dillon 9mm decapping dies, and wet tumbiling set up.
I always have the issues that primer sticking to the pin and pull back, and have tried many solutions like different dies (lee, rcbs, redding), polish the tip and shape the pin to an angle, but still cannot get 100%, until a friend told me the wet tumbiling may casue the problem. So I tried to reload with 800-1000 "dirty brass" which I picked up in the indoor range, and didn't get any problem so far.
For we tumbling, I am using Frankford Arsenal Platinum Series Rotary Tumbler and folloing Frankford Arsenal Platinum Brass Dryer 2 hours plus dry, still don't know what I did wrong. But if you have same issue with, may worth to try dry tumbiling for brass preparation.