German guns have sling loops so when walking about from stand to stand or coming in or going out of the field, the gun would be broken and hanging from the sling on your shoulder with barrels facing forward. This allows for the barrels to be pointed skyward and the empty chambers pointed to the ground. Very practical in a group setting.
The English typically will have their guns transported to their shooting peg and will be handed their gun(s). Same for moving between pegs.
We here in North America sling our loaded guns over our shoulder and let fly the moment we step into the field. Or as I've seen in the more rural areas of Alberta, the old fellow stops his car on a dirt road, sticks the barrel of his shotgun out the window, murders some poor hapless grouse on the side of the road looking for grist for his craw. The shooter's very corpulent wife then exits the passenger side of the vehicles and waddles over to what's left of the grouse, waddles back to the car and with the grace and elegance befitting the scene, hurls the grouse into the back of the car and squeezes herself back into the front seat. The car then proceeds down the road at a crawl looking for its next intended victim.
So, more of a German thing. Since having experienced this method of carry for doubles, I prefer it. Very comfortable and very safe. And it falls into the category of a sporting chance for the birds.
Kind regards,
Jaegermeister1