OK. Cheerio.
Bugger is sending his dies to me, so I will get to see if they work with the JGS 35 Bown Whelen reamered chamber,
and then a copy of that reamer with the long-leade, Winchester Magnum throat, scaled from .458 to .358.
The latter will be called the .358 Winchester Brown Whelen.
.358 WBW