Hi, I’m in the process of getting an antique 1884 made in 1891, it uses a 500 grain bullet, my question is I shoot 530 grain Postells in my Sharps, would they work in the Springfield? Black powder only of course.
The original 1873 load was .45-70-405. The carbine load was .45-55-405.
It was 1881 before bullet weight was increased to 500 grains for better long range performance.
A 530 Postell and black powder will be safe to try in a Trapdoor.
Stability and accuracy are left to the student.