For those of you that asked for info on my wildcats based on the big Jeff case, here ya go... I developed the dimensions for the .375-500 Jeffery in 2004 but it went nowhere, the gunsmith I was working with at the time refused to build me a rifle based on my design, I had a tendency to like faster cartridges and he was one of those old bastards that believed the .375 H&H is all you need... and I simply refused to have a .375 H&H ( as a teen I was almost shot in the back of the head by my hunting partner with one) I hated the ---- thing ever since . anyway... with the popularity of "The Pigman" on tv and his developement of the ".338 Twisted Pig" cartidge with Twisted Barrels, my interest in my design was renewed, 500 Jeffery brass is made by Jamison, Norma and Bertram.. yes, it's very expensive and hard to find in stock at this time, but it is available !!! I have contacted Dave Kiff at PT&G to make me the reamer, after altering some of my dimensions to maximize case capacity and create a .338 cal. version also, the reamers have been ordered !! Thus... the ".375 MJOLNIR" The Hammer Of Thor is finally going to be built..!!! (pronounced Myolner and is the Hammer of the Norse God of Thunder "Thor") it has a .357" long neck, 35 degree shoulder and case water capacity is 147.6 gr. ( according to Quick Design) approx. 24 gr. more than the .378 WBY, and 38 gr. more than the .375 RUM.... and a whopping 58 gr. more than the .375 H&H.... this will be built on a cm Rem700LA with Seekins 3.9" detach. mags as a repeater for regular hunting bullets, for long range it will run the 350 gr SMK's and 330 gr. and heavier Cutting Edge bullets as a single shot... the .338 is similar in design ....350" long neck, 35 degree shoulder and case water capacity is 145.1 gr.... Velocity is just Quick Load estimates at this time, the cartridge should place somewhere in between the .378 WBY and the .375 Snipe Tac... and that is just a guess at this time, the Pigman claims 120 grs. of powder gives 3400 fps with a 250 gr Hornady in his .338 Twisted Pig and with room for improvement, I can see 3500-3550 easy with coated bullets !