Reloading .223 at less than 2000 fps

[seadog]

I've had a lot of set backs-lessons learned. Pulled a bunch of bullets out of the barrel due to clays and tight group.I might go so far as drilling a gas hole in the barrel in ever increasing diameter. That is if the spring/load combination doesn't pan out but on a cheap barrel,not my barrel. Was also wondering if an aluminum carrier with a steel bolt would lighten the sprung weight or even be practical.