Recently purchase a Browning 1885 that has the flush/recessed swivels. I believe I am going to like these. When the sling is removed it's a nice clean, smooth look on the rifle and when installed they seem to snap in place tightly. Has anyone had any experience with these and how do they do when carrying a rifle on your shoulder all day? I would hate to see the 1885 hit the ground.
Not sure exactly what you have. There are several aftermarket designs for flush swivels. Quality of materials and installation likely determine field durability. Almost every long gun I own has a sling. At the gun store I have seen some of the flush stuff, never impressed enough for me to want to change over.
I believe you have the "push & twist" type. I have a Browning BBR with that type. I haven't carried it enough to know how secure they are but they seem like they would be good. They are a bit awkward to attach/detach but that's not usually a hurry-up process anyway.
I installed a set of Herter's flush swivels on my sporterized Jap rifle and hunted with it for twenty years. They worked well and never a problem with them. They were a push-pin design that pushed a pin into a groove in the receiver socket.
I've got a Steyr SBS with flush sling mounts. I think they're a good idea. I like the "push and twist" release. The thing is, on one of mine, the fore-end, it's collapsed inside. It's loose like there's no back pressure on whatever bears against the sling mount. I figure there's a small plate of sorts with a spring under it and that spring has worked its way up around that small plate allowing reduced pressure and slop.