Well...My Knight loves the .430 XTPs in 300gr...It hates the .451 XTPs in 300gr...
I'll stick to the .430s as that what my rifle likes...I've also sighted in 3 other inlines in the past year for family and friends...I used the .430s in all as I was the one supplying the bullets...Now, some did prefer the 240s over the 300s in .430 caliber but all were plenty accurate for deer hunting...Finding the right powder charge was the key...
One reason I prefer the .430s, look at the ballistic coefficient over a .451 in a 300gr hollowpoint...They are close to the 250gr SSTs we all tried a few years back trying to get flatter trajectories...