I've improved accuracy on injection-molded stocks by pillar-bedding and adequately free-floating them.
On some, I've also added epoxy-filling in the forends because some don't have X supports, only diaphragms, which don't provide adequate lateral stiffness. I foamed the cavities and filled the top 1/8" with epoxy.
Even one Model 7 stock that was split was repaired with a piece of bolt epoxied across the split and pillar-bedded. That rifle shot 1/2 moa with 140 gr. Core-Locts!!!
People are like rifles. Some are tried and true, having great eyes, personality, and fun to be with. Others never seem to hit the mark with you. Still others go off half-cocked. Still, it's nice to know most of them.