H4350 Powder Specs

[fishdoggydog]

I started to load up some rounds for antelope hunting with a couple boxes for prairie dogs. I do not shoot a lot with the .243 anymore, so my frame of reference goes back to the early 80's. My Hodgdon book said 45 gr. of 4350 with a 85 gr bullet. I decided to take a look on-line to compare IMR4350 with the H4350 and saw they say now do not go over 40 gr. with H4350. So my first box of loads is junk? My antelope rounds were with IMR 4831 and that is still the same load, 43 gr. under a 100 gr bullet. Any one know what changed in 35 to 40 years?