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.
Honestly.... if it could be done, I think it already would have been... thus the allure and attraction to the 300 BO... but carry on.... that's how man made it to the moon.
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