All good info. I thought I might also mention that this Clays load isn't one that someone just came up with yesterday. The pressure is listed as 37,000 CUP - so I'm thinking it was developed before piezio sensors and rating ammo pressure in PSI became the standard. This isn't a load that was developed during the 22 ammo shortage a few years ago, or during this ammo & reloading components shortage either.
As others have said, I'm thinking bolt gun plinking load.
37,000cup for 3.2gr of clays???? Too many zero's
I shoot a lot of reduced loads in a 14" contender chambered in 223rem. clays, bullseye, unique, am select for powders just to name a few. I swage and pc 70gr fn's and they do pretty good out to 50yds and putt a good thump on whatever they hit.