Tom Roster designed the shot collars for steel shot cartridges and has published many articles in Shooting Sportsman. There are many factors to be considered including hardness and barrel erosion, choke bridging, and high chamber pressure.
I don’t shoot steel in my old guns because alternatives are so available, but it can be done with the right hand loaded components. Unless a person is willing to study the issue carefully , the better course is to not shoot steel except through chrome lined bores in thick barreled guns.
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Threaded Mode