Some have asked so here it goes! The 405 JESS started out as a Westernfield 740A-E. and besides having a small chip out of the forearm it was near perfect, 30-30 and shot fine. The one thing it had was the metal forearm cap needed for this conversion. I sent it to Jes in Oregon and he said anything over 375 gets 4 groove instead of his 3 groove that is great too, I have a Glenfield 30 AS rebored to 38-55 also which shoots just as good. The price was $300 and something as I don't remember exactly but it was with return shipping and custom dies for the 405, 3 dies set as with all straight walled cases. The cartridge starts out with 444 Marlin brass cut & trimmed to 2.050 and resized back down to 41 caliber. I started shooting 215 gr cast pistol bullets until I found some Buffalo Arms .412 GC boolits at $28.00 for 50 and that don't last long as much as I shoot. I asked where they got the boolits from and they said from their custom mold. I asked could I buy one and the produced the number in their online search engine, pre-paid they built it for me in a couple of weeks. Cast up a hundred the first batch, sized and GC'd them and started shooting them with great satisfaction and have powder coated some to and they all shoot just as good.
I was shooting them with Brigadire 4197 powder but ran out of it so I tried some with H335 and they sure have a snap when they go off! This was last years Buck killed with store bought Buffalo Arms 300 gr GC that I now have the mold for, I bough a set of Lee 6 cavity mold handles for the mold and touch just a minor modification and work flawlessly!