Your right , most times they tend to think of the 45 Colt in Revolver loads , as for the difference between Hodgdon and Sierra , thats an easy one , Hodgdon's tests for general use while Sierra tests for
their products . They were also using different batch's of powder which in itself will give different results .
As for the 800X and win 231 , those came from Hodgdon's web site under 45 Colt standard with a 250g bullet , not TC loads . For what its worth , I shoot a ton of 45 LC in Handgun and have found that a heavier bullet going slower does a better job for what I'm doing - your mileage may very .
Lyman's 49th
Pistol data240 grain JHC
unique 8.0g to 8.8g = 827 to 917 fps
2400 15.0g to17.0g =765 to 997 fps
Power Pistol 8.2g to 9.2g = 861 to 957 fps
N340 8.8g to 9.8g = 870 to 982 fps
Rifle data unique 7.5g to 9.5g = 952 to 1176 fps
2400 15.0g to 18.5g = 973 to 1321 fps
Here you can see that while the load does not change much on the lower end the top end does along with the fps .
stimpy