The 348 case was wildcatted in rimmed form for lever gun use and the 348 case was also used as a basis for rimless wildcats for use in bolt actions. The Ackley books refer to several of the bolt action variants. Typically the rim was turned down and an extractor groove cut. The body taper reduced, neck shortened and the cases were necked up and down in a variety of calibres.
There was a resurgence in interest in such wildcats back in the 90’s and I recall reading about two versions, one was based on the full length 348 case and another version shortened somewhat. They were called Heavy Express or something like that and came in a range of calibres. Anyhow there was sufficient interest in those cartridges that it spurred Winchester into developing the WSM and WSSM range of cartridges and later Remington to develop the RUM and SAUM cartridges. All of these cartridges are loosely based on the 348 case dimensions.
Regarding the bullet diameter of the wildcat you have, Elmer Keith used bullets from the 333 Jeffries to develop several wildcats under the OKH banner (O’Neil, Keith & Hopkins). This was all done prior to the introduction of the 338 Win Mag. The popularity of the 333 based wildcats was what convinced Winchester into developing and releasing the 338 Win Mag, a calibre not used since Winchester introduced it in the 33 Winchester.
Last edited by JFE; 09/16/19.
