Re: Marlin 27s 25-20
I had a 25-20 Stevens model 44 single shot, years ago. Even with a crappy bore, it shot 2 inch groups at 100 yds, with black powder loads. I foolishly swapped it and the reloading gear off for some frivolous gun. I am not sure, but I may have an old Ballard in 25-20. It is one of those winter projects I purchased 30 years ago and never did anything with it. The bore is dark. I intended to have it relined.
There were three rather popular small 25 caliber centerfire cartridges a century ago. the first was the 25-21 Stevens a narrow straight wall case. Then there was the 25-20 single shot. A slightly shorter and only slightly bottle necked case and then the 25-20 Winchester centerfire. an even shorter more bottle necked case. The first two were almost entirely used in single shot rifles. The 25 Win CF was developed for lever guns and was even used in several revolvers.