Just a little background.....
"Early" laminated material,this being what gunstocks and trad bow parts consisted of; was brought to the forefront by a company up in NY,if memory serves? Late 1980's? Can't remember the co's name...... further CRS,that place burned to the ground. ANYWAY,back then as a burgeoning market/product,like so many things was held to a much higher std than what's being produced today. Originally,it was all,"hard maple" with honest to goodness epoxy. When that co's interest went up in flames ..... there was a new trend or "player" in town. Russian birch. Seems the ruskies got this stuff coming out of their ears? Nothing new on the trees themselves,it was trade agreements and political climate that saw them "dumping" it on our,tenuous at best,lumber mkt.
The above is just,reasonably close tale of the how's N when's. No need to get your pantys in a wad.
The laminated stock(and bow) wood we get today is not in the league it was say 20 years ago.