Unspellable, thank you for shedding some light on a subject with some actual facts. I'll paraphrase some other facts I have heard regarding the double rifle. Back thrust is a function of PxA where P=pressure and A=area of head, therefore the small head of the 375 produces no more thrust than a 470 nitro; the main cause of a breach coming off face is lack of quality grease on the hinge; and polishing your brass will help prevent sticking, With that in mind, I load my 375H&H to the lowest pressure that will regulate the gun, polish my cases and clean and grease the hinge after ever day shooting.

Also, I put a drop of qality oil down those tinny springs to prevent them from rusting and breaking.

Question, my gun has side clips. What are they for?