As 1SHOT_1KILL said, there is no set standard. That's why what works in one rifle might not work at all in another. This is even true in the same brands although that might now be caused by barrel differences. All muzzleloaders have a sweet load as it is called and it must be "found" because no one can tell you what it is. They might be able to put you in the ball park and even get you right on the money, but you still need to try different projectiles and charges until you find the one you like that shoots great for you. I am learning this with my new Black Diamond. It likes T/C brand projectiles so far real well.