I have been using Mighty Armory dies for a while also part of the team. Let me know of you have any questions on the dies or ability of the dies.
Just a little but of information but last year at USPSA Open Gun Nationals, my velocities at the chrono stage were within 5fps of each other on the three rounds they fired. The only thing different I had done to my reloads was started to use the Mighty Armory resizing die. The made my ammo so consistent and also no ammo issues during the Match. I was able to win B Class in Open at Nationals.