jfg - I assume you're lloking to clean it. Just follow Cayugad's instructions. And when he said to lift the barrel straight up - lift up as if you were lifting the muzzle 90 degrees of the stock (not straight out from the butt).
If you're going to clean it, get a bucket or 3 lb coffee can and fill it about 3/4 full with hot soapy water (dawn dish detergent is great) and put the barrel in breach end first and let it soak for a few mins. I am assuming you have a percussion cap so yo will need a nipple wrench or a small wrench to take off the nipple. When you get the nipple off, put the breach end of the barrel back into the water. Put the appropriate jag on the ramrod or range rod and wet a patch and place it over the muzzle. Start working the patch throught the bore. A little at a time with short strokes. Once you reach the bottom you can begin working the patch in longer strokes. This will create a vacuum and start sucking water out of the container and flush the barrel. When you are satisfied that the barrel is clean, you can pour hot clean water down the muzzle to rinse it out. Dry the barrel thoroughly (It will be hot so a couple dry patches followed by an alcohol patch and dry patch should be sufficient.) Clean the outside of the barrel around the nipple area to remove any residue. Dry and give the entire barrel a light coat of oil. Apply some antisieze to the nipple threads and reinstall. Then coat the inside of the bore with either bore butter or a high quality gun oil. Reassemble.
Note: the wedge pins should be snug but not too tight. Try flipping them over if they are too loose or too tight. You don't want them to fall out nor do you want to have to tap them in with a mallet. A firm thumb pressure should be all that is needed. You can bend them slightly if you must by laying on a flat surface and tipping them in the center with a mallet until you get the proper fit.
Sounds like a lot of info but once you do it a couple times, its easy.