435PH Express case is 2.850 long, 25' shoulder, .480 neck length. Designed for function and reliability, and is not a hot fat case with minimum neck for more powder as most would expect. Hence people always enjoy shooting cases like 375H&H, 416 Taylor, 404, even 458WM, as they dont kick like hell. The velocity of 2250fps with 450 grainer, or 2350fps with 410 grainer will do the job. I have experienced bullets in some cartridges eventually hammered back into cases, but one will note many of the old fasioned cases have long necks to fully support bullets. Thats one good point about the 458WM and 458Lott being straight walled there is heaps of bullet support.
Reamer, dies being made in USA, organized by Julio Acum gunsmith who is also build a couple of rifles... still coming... not sure of manufacturer but I can chase this up.

Regarding Mag capacity:: We enjoy using CZ / Brno rifles mainly as we can get 5x 375s etc in the magazine, finish is sometimes rough, but everything is steel and they work very well. Very popular with African PHs. In USA they have different stocks, and chambered in some other calibers like 404, 458Lott, 505Gibbs.