Personally, and I mean no disrespect, but I've never been one to drink the Kool-Aid on cartridges where there is such a teeny tiny change to the parent case design. Again, no disrespect but all of Kindler's creations are so minimally changed I just don't see the point of any of them over the straight neck down of the parent case versions. I'm sure some will read this and instantly see red. I'm fine with that and we all have our opinions but for me, it seems like a whole lot of marketing fluff just to get your name on something so you can claim it as your special design.
I've never owned a 20 Practical but considering it's a straight neck down from the parent case and would use dies many of us already have, even if there was a performance gain to the 20 Tac over a 20 Prac and at equal pressure I doubt there is, it wouldn't be enough to justify the extra cost of another set of dies and extra brass prep.
As I've stated many times before, the older I get the easier I want things to be and the less time I can spend in the loading room, the more time it leaves me to shoot and or do other things.