If some guys are expecting to make 375 Warlord dies in 7/8" or 1" it's not going to happen at Whidden, or anywhere else ..... all my Whidden dies are either 1 1/4" or 1 1/2" ..... the Warlord will need to be made on the 50 BMG 1 1/2" blanks which are $50 more per die, not a big deal, these guys need to realize that the 375 Warlord is a "wildcat" and case forming and reloading dies are custom made by request and will cost more .... plus their usual Rock Chucker and similar reloading press is out of the question, they need to spend some coin on a press such as the RCBS Ammomaster 2 to reload the 375 Warlord, the 1 1/2" dies screw directly into the press and you can get press top bushing conversions from CH4D for all other dies from 1 1/4", 1" to 7/8" , see link .....
https://www.ch4d.com/products/equipment/presses/ptb
you have to use non-standard dies and presses, their is no other option, the 375 Warlord case is 3.3" in length and coupled with the long high bc 375 cal bullets it is up to 5" in total cartridge length, absolutely must use 50 BMG die bodies ......
need to understand the fact that it is a wildcat cartridge and formed/headstamped brass does not exist and needs to be formed from 585 HE brass, need to order case forming dies when you order reloading dies, formed brass is not and will not be available...... Bruce Bertram is not going to be making 375 Warlord brass, unless someone is willing to cough up $44 thousand dollars and order the 10 thousand min pcs he demands for custom made brass, if they do they will still need to have my authorization as the 375 Warlord is my wildcat cartridge, I may have allowed reamers to be made for the public but the design and name of cartridge is trademarked and belongs to me and no one else ....
Ed Hubel has 585 HE brass available to form the 375 Warlord out of , JGS, Manson and PT&G make the reamers , beyond that .... dies are custom orders from whoever you choose to make them for you, you WILL need case forming dies to make the cases then fireform in your chamber then a set of reloading dies to load, shoot and reload ..... treat it same as you would any other wildcat cartridge but understand that it is a much larger cartridge and requires larger equipment to handle it