Triumph's work really well with Blackhorn, the simple easy way is Shock Waves and 110 grains of Blackhorn or if you wish the cheapest load the 'Cheap Shot" package.
Use Hoppes Elite to clean when you are done shooting take an 1/8 inch drill and clean out the carbon every 10 shots by inserting it through the primer seat and pointing the barrel up while you use the drill to remove the carbon.
If you use 777 remember to clean the crud ring out every shot a load not seated firmly on the powder is dangerous.