You are getting good advice, but I will go a bit against the grain and say that I just love the .430 300 grain XTP and use it in all my inlines (Knights). It shoots very accurately using the Crush Rib sabot, often giving 3 shot groups under an inch.
I prefer the .430 diameter bullets because they have a better ballistic coefficient than the .452's and should shoot a smidge flatter and penetrate a mite farther than a .452 of the same weight and construction.
And I just bought a bunch of those bullets from Midway for $12.95 per box of 50. It makes for inexpensive shooting while still using a great quality bullet. I have killed several deer with them and they do alot of damage and still pass right through. I would not hesitate to use them for heavier game and they shoot flat enough for 200 yards if you know what you are doing.