I am in the process of building a very similar rifle on an antique flat spring Highwall with close coupled double set triggers. My rifle has a straight stock with a full 5" tall steel shotgun buttplate at 13-1/4". I had to modify a pattern stock with Bondo to do that. My fore end is much shorter with a little schable that I can grip with my off hand. My rifle is .30-40 Krag with a 24" octagon/round barrel. The only thing I don't like is mine weighs almost 8 pounds. The octagon section adds a little weight I guess. My rifle has Talley scope bases on the barrel with a Talley aperture sight mounted on the rear base. I can't evey try to see the irons well enough with a barrel sight. I just took my gun to the smith for bluing and color hardening today. Good Job!