I'd personally never waste any time trying to load and shoot cast bullets in my .22-250 either. Yes, you can drive a Ferrari slow, but why would you putt around town loading it up? Just get a VW bug and putt around in.
The .22-250 was designed as a wildcat varmint cartridge for long range hunting, and wasting powder and loading time to putt around seems like a poor use of time and components to me.