WOW! To use a short barrel Calvary carbine with no doubt the worst sights ever was really a poor choice to start this comparison. The 1873 rifle with it’s superb rear sight would have been the way to go.
I shoot all the rifles in the test and have a High Master classification in HP competition. The 1873 rifle & the later models are extremely accurate . Even more so with black powder.
The test started of poorly.
The 1903, M1 & the M1A are very accurate, especially the SAI Loaded Model.