Speaking from experience... I have purchased and mounted my .300 WM in a Sharps Bros... They are a chassis made for a 700 Rem. action and half-ass made to work with the RA LA. The tang safety is not operational with your shooting hand's thumb unless you release your hand from the grip. I sent it back the next day. I then purchased a Bell & Carlson Sporter stock. Very rigid and well designed. I'm waiting on the Salmon Creek Hunter Rail to arrive and mount. About $100 less than the Sharps. If you're lucky, you may be able to find a chassis made by Brownell's, but good luck... Downside of all available stocks, they are all designed to only use the factory plastic mags.