Check hte links pages in Member Resources in The Forum above. It give you the names of dozens of suppliers of all kind of things.
As to loads, it all depends on the game you wish to hunt. Since you live in British Columbia, you have deer, and black bear all over, as well as protected wolves, some moose, cougars, etc. That .69 cal gun will kill anything on the continent using a Patched Round Ball( PRB). If it is a true .690 bore its a 14 ga. shotgun, and you can buy wads for it through Track of the wolf( TOTW), among others.
The shot size you choose would also depend on what you wish to hunt. It doesn't take a 14 ga. shotgun to kill rabbits, so a light, 1 0z, or lighter load of #6 shot should do the job. Take a look at Bob Spenser's Black Powder Notebook
[url]
http://members.aye.net/~bspen/index.html[/url]
amd read the articles on loading shotguns. V.M. Starr's article is particularly useful, but read the other articles, too. You will learn a wealth of information, and have that reference source at your fingertips in the future, too. You probably have grouse and possibly ptarmigan in the Province, depending on where you live. Those can be killed with the same, or even smaller shot, say, #8 instead. The ranges are fairly close, and the real problem is mounting and swinging the gun on to the target before it puts a forest between you and it! There is real satisfaction, however, in taking any game with a smoothbore musket. If you are going to hunt bear, you probably would be wise to cast some balls with a harder alloy lead, rather than pure lead, just so you have a ball that will penetrate even after striking bones, and get to the lungs and heart. A .69 diameter round ball is going to weigh 1 1/8 oz. so don't worry about whether it will penetrate enough.
And you don't need to put a lot of powder down the barrel to get that ball to move fast enough to penetrate even on bear. Shooting those large balls, or loads in that large gun can be tiring. Take it easy on the gun and on your shoulder by using reasonable loads. Do use an overpowder wad, to seal the gases away from your PRB, and keep that patch from burning. That will give you much better accuracy. You probably will want to find a ball that is either .680, or .670 in diameter to shoot in that .69 cal. barrel. If the bore measures smaller or larger, then order a custom mold that is no more than 20 thousandths smaller than the actual bore diameter( use a caliper to measure the bore.) That large ball upsets pretty well when the gun is fired, jamming the patch into the sides of the barrel. You want to use a good lube on the patches, but keep the patch and ball combination loose enough to be easy pushed down the barrel.
