No matter how new, the over all technology is still 18th century, and has some draw backs where pressures are concerened! That being said, I don't have as much worry about the pressures in a modern double rifle factory chambered for the 375H&H, or 458 Win Mag as long as factory, or equivilent ammo is used, as I do about them being a rimless cartridge. I suspect the "OFF FACE" condition is caused more often by hot handloads, than with factory ammo!

No matter how clean the rifle is, when you leave camp to hunt Buffalo, the dust in Africa is so fine it will invade a light bulb!

The basic design of the tiny springs, usually a leaf spring, that opperates the Tiny pall that snapps over the rim of the cartridge on closeing, is prone to problem. It takes very little dust to take the extractor/ejector system for rimless cartridges out of service.

The other thing is, most who want a double rifle so chambered, are usually new to double rifles, and are often people who think they can hop their loads up like they do in their bolt rifles. This is the thinking of a novice, and doesn't work if one wants a double rifle to work properly. The hot load not only increases the pressures to an unsafe level for the rifle, but destroys the regulation as well. These people are usually people who want to use mono-lithic bullets, or X-bullet in ther doubles, another thing not reccomended.

People Like CaptCurl, are not novices, and are very well schooled in the proper use of double rifles. I venture to say, the 375 H&H double he posted the picture of, will be babied, and protected, till the exact moment, the rifle is to be used on a Cape Buffalo. Most hunters do not want to baby their rifles to assure they opperate as advertized. The pictured rifle would be one of the finest for a Leopard over bait,plains game, or North american hunting, and would most likely never give a problem with Captcurl owning, and hunting with it.

The best thing one can do if he wants a double rifle to work at the most inopertune moment, no matter the bush condition, or cleanliness of the rifle, is to buy one chambered for a rimmed NE, low pressure cartridge, with a non-auto safety, and double triggers, if dangerous game is the main target! If the 375 H&H is wanted, then the 375 H&H flanged is the way to go, eventhough ammo is harder to come by. For most a double rifle is a handloading affair anyway, I see no problem with the 375 FL!