Before my health began to decline , I made it a point to put a generous sized flap on my shot pouches. The large flap was perfect to cover a flat horn used on long day hunts , and trips to the camp ,and trips to the range. The two guns I have and use have their own dedicated pouches and kept stocked with the necessaries for each rifle , so all needed is to grab the appropriate pouch and go. In the old days there are many recorded instances that each gun has it's own unique pouch , but not necessarily with the horn under the flap. Most horns had their own straps and were over the shoulder , or fixed above the pouch on cordage attached to the pouch straps. Getting older , my huntin' buddy and I analysed all the stuff we were carrying in our pouches , we decided that WW-1 was started with less ammo than we carried , and so, scaled back our supplies to what was necessary for the occasion , and in my case, sans the under flap horns...................Sorry for the trip into the weeds...........oldwood