Kid, the choke is the amount of restriction in the business end of the barrel on a shotgun. Choke controls the pattern tightness and distance of effectiveness of the shot load. On your Baikal, you might have screw in chokes, or maybe not. Break the gun down - take the barrels off of the frame, (a safety measure, for sure) and look at the muzzles. If there is a sleeve sort of device in there with two slots in it, that is a removable choke. If this is the case, you should have gotten a choke removal tool with your gun , and perhaps an extra choke tube, as well. The tool is just a flat piece of steel about one eighth of an inch thick, shaped in a T. It fits into the slots in the choke tube, and they can be unscrewed from the barrels. The tubes are marked - IC for improved cylinder, M for modified, F for full. The amount of restriction is designated by those letters: full choke is the tightest, then modified, improved, and finally cylinder(designated C), which is a straight tube with no restriction. Most doubles with fixed chokes, are M - IC, which are good all around chokes for short range use. There is much more to it, but this is the nuts of it, basically. As an aside, when you go to the next shoot, ask somebody there if they can help you sort this mess out; one of the more experienced shooters should be able to help you out.