Have seen, been involved in discussion, arguments over the 20P vs 204 Ruger. Everyone has their angle on it, depends on platform as well.
I know what the 204 is capable of with published loads, I also know how far I can push it beyond with no brass issues.
Buddy built a 20 P with a 30" barrel. It equals and passes the 204 with his load of CFE223 and 40 Vmax.
I am fortunate that I have a good stash of brass and ammo for the 204 Ruger from some years back, buy in bulk and save.
I am waiting on a 20BR, got bored, saw how many 32-34 grain bullets I had, 20 Vartarg in the works.
The 20 is interesting to work with. I wish Berger throw some discontinued stuff back out, or Sierra step up their offerings.