99% of all rifles have 1 or 2 screws holding the action to the stock. Most are not "bedded" but are instead rely on the soft stock wood or nylon. As the action heats/cools it can affect your accuracy by tightening/loosening. Bedding the stock is the act of inserting brass or steel tubes into the stock holes that allow you to lock the action down good and tight with the screws. It tends to raise the barrel a little out of the channel, therefore making it more free floating (allows it to vibrate on its own harmonic when being fired without outside interference) and stabilizes the action for a rock hard shooting platform that will not vary. After I bedded my savage I lock tited (the removable red type) the screws in place The other thing I did is glass the barrel channel. This is not necessary on high end synthetics, but is a benefit on wood and cheap synthetic stocks (like on my savage). Cheap synthetics can warp by applying to much pressure on the fore arm and wood can swell/shrink with humidity changes. This can cause the stock to touch the barrel and affect the natural harmonics when shooting. By sanding out the barrel channel you can lay in thin layers of fiberglass and resin it in place. You then sand the excess resin and glass out so the barrel has room to free float (you want at least enough room for a dollar bill to slide in all the way up to the action). By doing this you strengthen the stock and make it warp proof. I learned all this when I was on a long range rifle team in high school and college. I had interest in it and our Armorer took me under his wing to teach me some of the odds and ends. It makes a huge difference, but should not be attempted without some detailed instructions.