Can't tell much from Hornady's Website. The descriptions for all four of their 44 caliber XTP bullet weight's are the same. No doubt the 300 grain is a good bullet in the 44 for putting game down, not that I would have thought otherwise.
http://www.hornady.com/store/44-Cal-.430-300-gr-HP-XTP/Details
44 Cal .430 300 gr HP XTP�
Features:
Controlled expansion to 1.5x its original diameter over a wide range of velocities.
Heavier jacket stands up to the high pressures and velocities of the highest performance handgun cartridges.
44 Cal .430 240 gr HP XTP�
Features:
Controlled expansion to 1.5x its original diameter over a wide range of velocities.
Heavier jacket stands up to the high pressures and velocities of the highest performance handgun cartridges
44 Cal .430 200 gr HP XTP�
Features:
Controlled expansion to 1.5x its original diameter over a wide range of velocities.
Heavier jacket stands up to the high pressures and velocities of the highest performance handgun cartridges.
44 Cal .430 180 gr HP XTP�
Features:
Controlled expansion to 1.5x its original diameter over a wide range of velocities.
Heavier jacket stands up to the high pressures and velocities of the highest performance handgun cartridges.