just like with centerfires, wood expands and contracts and will change the POI at times, where the synthetic doesn't. i admit the savage plastic stock sucks, but at least stays stable.

most of the replacement stocks you see for these things are for looks and comfort with no "tangible" accuracy improvements in them other than a freefloating channel.

BUT comfort and a good feel in a stock may actually improve the shooter's performance (cheeck weld, eye alignment, grip, etc.) rather than the rifle's as generally a comfortable rifle is handled better than an uncomfortable one.