OK what you need hear is the 3rd edition and 5th edition Hornady manuals. Go to the data about the .460 Weatherby Magnum I beleave these manuals are 20 years apart . read all but pay attention to the last sentenance. It reads as follows , This rifle showed a preference for H380 with the light bullet and IMR4350 with the 500 grain round nose. OK well maybe it did in 1980 in the 3rd edition but where is the data ibn the 5th edition , for the 5th edition they didnt even use H380 or IMR4350 So what do you guyus think about this?

Tanoose--Those loads in the 80 manual were over the SAAMI
pressure specs that Weatherby gave to SAAMI in later years, to allow for a bigger margin of safety.Ie, they were loading too hot before even with factory loads.Ed.

Hey, at least you know they are actually testing loads and not just repeating the same 'ol data. I like to see different loads in different editions. What really gripes me, is buying a newer edition and all the data has be recycled.

Look in any old Shooters Bible, in the Weatherby ballistics section. They gave factory equivalent loads with IMR 4350, or in some cases 4831, for all their loads. Those loads were HOT!

when better powders become available they change load data. IMR 7828 is a good powder for the weatherby cartridges.

In the early '80's, I genned up a load for a .41 Mag pistol straight from the just outdated Speer manual at that time. A friend fired them and had a hard time opening the cylinder because the primers had backed out and flattened. Another friend checked my load against the new Speer manual and said I exceeded the high end of the data by two grains. 11 instead of 9. Be glad Hornady is on top of the loadings rather than worrying about overpressure because Speer screwed up and never published errata.

What I hate is when current manuals diasagree to a large extent. Compare .380acp loads in Speer #13 and Hodgdon's current relading "magazine". The MAX load in the Hodgdon manual for Universal is less than the MIN load in Speer #13. Same bullet.

Rifle loads seem to be closer. Rarely more than a grain difference there.

But did they actually do any new data , and what rifle did they use , the page was almost word for word from the page they wrote 20 years ago. You need to go to the fifth edition and read it then look on the next page and check out there loads for the h380 and imr4350, there not there. I emailed them lets see what they come up with.

"Speer 3" 1959 44mag 240 gr JSP--------23.0 gr 2400 1564 fps
"Speer 6" 1964 44mag 240 gr JSP--------23.0 gr 2400 1564 fps
"Speer 7" 1966 44mag 240 gr JSP--------23.0 gr 2400 1564 fps
"Speer 8" 1970 44mag 240 gr JSP--------24.0 gr 2400 1574 fps
"Speer 9" 1974 44mag 240 gr JSP--------19.5 gr 2400 1344 fps
"Speer 10" 1979 44mag 240 gr JSP&MSP 22.2 gr 2400 1392 fps.
"Speer 11" 1987 44mag 240 gr JSP&MSP 22.2 gr 2400 1452 fps
"Speer 12" 1994 44mag 240 gr JSP&MSP 17.7 gr 2400 1271 fps
"Speer 13" 1998 44mag 240 gr JSP&MSP 21.0 gr 2400 1434 fps

Personally, I DON'T like it when all a new manual gives you is a reprint of one I've owned for the past 20 years! I buy a new manual to learn something I didn't already know! I am particularly looking for data on new powders and new bullets.