Here is picture of the bolt from the experimental action,

with our 416 HSM case in it. Note the amount of the

base size of locking lugs, the amount of area on the bolt..

Here is link to guy doing special 585 HE in the EU,

Good pictures............www.585he.cz

We tested intermediate action with a 700HE barrel we had here.

Just temporary to test strength. 1000 gr over 3100..

Action worked fine.. Ed.