All of the factory synthetics are injection molded plastic, they are all pretty much the same. Bergara does a better job than most of giving the appearance of quality, but it is still a cheap stock using exactly the same construction. I think Tikka or the older Ruger Hawkeye synthetics are going to be the stiffest, but also think that is over rated. Magpul still uses the same injection molding, they just use more, and thicker plastic. They are fine for a target rifle, not a hunting rifle even they call it a " hunter" stock.
The cheap Ruger American rifles and a few other designs use a completely different bedding method that doesn't require a stiff stock. They can be limp as a noodle and still shoot great as long as there is enough clearance so that the barrel won't contact the forend. In fact all of the cheap plastic stocks shoot better than 99% of shooters. The only real reason to change is for aesthetics.
If one of the quality suppliers has one for a Ruger American I would go that route.
Here ya go!
https://www.stockysstocks.com/stock...-medalist-ruger-americantm-sporter-stock.html
The B&C Medalist stocks with an aluminum insert molded into the stock are the least expensive quality option. The aluminum chassis provides strength, but it also adds bulk and weight. But the weight on these is not excessive, especially with an already lightweight rifle like the Ruger American.
If I were going to replace the stock on any of my Rugers this is the way I'd go. But I'm having a hard time justifying spending $300 on a stock for a rifle that cost me under $350 that already shoots 1/2 MOA as it is.
If I wanted a quality stock i'd just buy one of the cheap rifles and replace the stock. The B&C Medalist is the cheapest I'd recommend.
The difference between the high end McMillan, Brown Precision, and a few others is significant. As is price. You'll pay $500-$600+ for one, but instead of a metal insert they laminate layers of either fiberglass or kevlar cloth ti form the core of the stock. The action cutout is done exactly the same as it is done with wood rather than just coming out of a mold. You get a stock that is just as rigid, but significantly trimmer and lighter.
You can get one of these stocks as light as 14-15 oz with 22-24 oz being typical. Compared to factory stocks in the 32-36 oz range. The ones with aluminum inserts are 32-40 oz. depending.