DD,

You mention your WR 1871 has a rough bore. Have you tried lapping it? I ask because I had a Alexander Henry seal rifle with a very rough bore. The person who sold it to me said he could get it to hit a 12" circle at 25 yds. Over several days, I lapped the bore and was able to get the rifle to shoot a 2" group at 25 yd.s using 458" hard cast bullets driven by 4198. While not great accuracy, that was a tremendous improvement.