Chap
Hornady lists the .452/300 XTP Mag @ .200 BC with a SD of .210
The regular .452/300 grain XTP is listed .180 BC - SD .210
The .430/300 XTP is listed @ .245
So the two 45 cal XTP's ought to fly about the same but the Speer should do a bit better especially at extended ranges.
https://www.hornady.com/shop/?ps_session=25a9cddeceb1bf6ea9f090505192f4b1&p age=shop%2Fbrowse&category_id=c824f8a3cf4470d4 fa95f4c7b72957e0
But Mikes question had nothing to do with 300 grain he was asking about the comparison of the two 250's
One more question: Does anyone know how similar the 250gr GD shoot to the 250gr XTPs? It would be nice to know if they pattern similar for target shooting.
The Hornady .452/250 grain XTP is listed as .146 BC SD .175
The Speer Gold Dot .452/250 has a BC of .165 SD .175
So again the Speer has a bit better BC, but in my shooting of both bullets I really do not know if you could really tell the difference in the POI of the two @ 100 yards.... Now Terminal Performance I would bet an arm and a leg that the bonded Speer Gold Dot will out perform the XTP... even the 300 grain XTP's.
Hope this helps a bit Mike