Sewerdude
Let my try to summarize...
300 Grain
TC Mag Express (refers to the sabot)
300 Grain Hornady XTP w Sabots
These are the same bullet in different MMP Sabots.... the TC Mag -title- refers to the Mag Express Sabot which is a MMP HPH-24... the Hornady will come with a MMP HPH-12 sabot which is thicker.
This is a Hornady .452/300 grain XTP Mag

[/align]
This is a Hornady .452/300 grain XTP

[/align]
This is a Hornady .430/300 grain XTP - notice the difference in the distance between rings on the 44
Hope this doesn't confuse the issue...
[/align][/align]