I’ve been shooting a 20 tactical for a few years, it’s a great caliber! One pass through a 20 tac die and you’re done. One thing I’ve noticed in 2 barrels (different manufacturers) is that the caliber must hide pressure really well or I get 2 very fast barrels. The sharper shoulder helps with brass growth, generally with barrel life slightly, and velocities/pressures, now that’s all to a small degree. The 20 prac is definitely more popular. The next one I’ll do is a 20-223ai when these barrels are toast