| style="background: #eeeeee" | Winchester || WW760 || WW760 |- |colspan="5" align="center" | |} For reduced velocity reloads powders such as Accurate Arms' AA8700 and Hodgdon's H870 have performed well. With AA8700 and H870 there remains a large quantity of un-burnt powder. Faster powders occupy less volume; so a filler such as Dacron is used to hold the powder charge against the primer to provide shot to shot consistence and reliable ignition. Cases At present there is one single manufacturer of .460 Weatherby Magnum brass: Norma Precision. Norma Precision manufactured brass is headstamped as Weatherby (as opposed to Norma) as they are under contract by Weatherby to manufacture Weatherby Ammunition. Weatherby brass is available from Weatherby. Primers When Roy Weatherby began working with the .378 Weatherby Magnum, the parent cartridge of the .460 Weatherby Magnum, he found the primers of the day to be unreliable. Roy Weatherby contacted Charles L. Horn, the founder of Federal Cartridge Company and explained his problem. Horn's reply was "We'll make you a primer that, by God, will set your powder ablaze". The Federal 215 primer was developed for the .378 Weatherby Magnum cartridge and is the only primer which is generally recommended for use with the .460 Weatherby Magnum cartridge. This primer was created specifically to provide reliable ignition for compressed powder charges in large capacity cases. All reloading manuals provide loading data using only this particular primer to develop reloading data for the .460 Weatherby Magnum. In a pinch the Winchester WLRM primer or primers with similar brisance may be substituted. The Federal 216 primer is not available for sale to the reloader at present but should the primer become available it may be substituted for the Federal 215 primer. This primer was developed for the .470 Nitro Express and is currently used by Federal to load the cartridge. Dies Full length and neck sizing dies are available from RCBS and Redding. A full-length die set is available from Hornady Manufacturing. Most two-die set includes a bullet seating die and either a full-length resizing die or a neck sizing die. A full-length sizing die reforms the complete body of the case to specification. The neck sizing die reforms only the neck so that it can hold the bullet in place. Neck-sizing cases rather than full length sizing cases can extend the case life of cartridges. On the downside, cases that are only neck