I see the 750 has a "limited lifetime warranty". Dillon will either repair or replace defective parts on an exchange basis. I hope you don't have to send Dillon broken springs and other small parts to get replacements.
Any long time subscriber should know this. Check out Hickok45's FAQ 11 and Reloading tips - powder charge. I don't think it's a light load by any means.
Competition electronics will rebuild or replace at 1/2 retail price at most. Got mine back a month or so ago. Cost me $52.00, that included shipping to them, repair and return shipping.
Mine was in worse shape than yours.
http://www.competitionelectronics.com/support/returns-service/
Castpics has many old manufacturers reloading guides available.
http://www.castpics.net/LoadData/Freebies/RM/Alliant.html
I suggest Alliants 2003 guide. I use 3.9 gr. at 1.145" with precision delta 124 gr. 9mm. Averages about 1070 fps. out of my glock.