Try Western Powders load guide #6 free download at:
http://www.accuratepowder.com/load-data/ - click “View complete load guide edition 6.0 PDF” in the red box.
Hodgdon data manual #26:
Doesn't specify bullet type
260g Unique 7.0/8.0g 709/770fps 12,00/15,500CUP
275g Unique 7.0/7.5g 667/705fps 13,100/15,200CUP
300g Unique 6.0/7.0 634/689fps 13,1000/16,000CUP
Hodgdon load center is a great resource
http://www.hodgdonreloading.com/
In older 45 they go up to 260g & 300g with Tight Group
In Ruger and FA they go up to 360g with Tight Group didn't see Unique
Here is the Hercules 10-1985 guide I uploaded somewhere awhile back
It only goes up to 250g
You can right click and "save as" then use your photo viewer to blow it up to a useful size