You will have a hard time finding any reasonably priced ammo for that Model 8. It hasn't been commercially loaded in years. You might try reloading or having a friend reload for you. Theres a lot of good info on loads and components in another post on this thread. The problem with reloading this caliber is that the dies (RCBS) cost about 贄. You'll have to do a lot of shooting to pay that off. The Handloader Magazine article mentioned in the other post is worth getting. They don't have back issues, but they will send you a copy of the article, for a nominal fee of course.