I have done this to both of my Stevens 200 223's. There are two screws that have to be removed. One just in front of the trigger guard and the other just behind the recoil lug. You will need a 5/32" Allen wrench for these screws. This is the only tool you will need. When you take the action out of the stock, the magazine spring and follower (attached together) will come out of the magazine well or maybe fall out. No big deal, just note which way the spring is facing so you can put it back in the same way. The first bend faces backward, the end of the spring faces forward. There are slots cut on either side of the follower that match up with the magazine well to help orientate the spring/follower. Once you get the them out, with the action/barrel upside down, you drop the load tray into the magazine slot. It is tapered and there is a slot on both sides that will match up to the magazine. The smaller end goes forward, with the cartridge groove facing the bolt (down with the action upside down). Some times it will drop into place and some times there is a little resistance, if there is, just push it all the way up into the magazine well. With the action still upside down place the follower/spring back into the magazine. The spring will be above the magazine well. Put the stock back on the action, in a straight down motion. While holding the stock and action together with one hand, replace the screws to took out earlier. This can be a little tricky, holding the action and trying to get a screw in. I usually use my cleaning cradle to hold the action while I put the stock back into place. I place a screw on the Allen wrench ahead of putting the stock back on and then just put it into the hole and tighten it up a little after the stock is pushed into position. It should stay together with just the one screw being in place, even if it is not real tight. The longer screw goes to the hole in front of the trigger guard. Snug down the front screw (the one toward the barrel) and then snug down the back screw. Now tighten the front screw down with as much force as you can with out stripping the head out, then the one on front of the trigger guard. When I say tighten down, I mean really tight, just do not strip out the head or break the screw. This sounds much more complicated than it really is. It is pretty simple and straight forward. I have no feeding problems at all and it is real smooth, almost as smooth as my Remington 700, which I converted to a single shot too. Good Luck and Good Shooting.
