I'm not going to get into this argument. I've always been told to shoot flat nose in tube magazines. 30-30 Winchester silver tips are flat nose. That's what I shot in my model 94. Also had a 25-35, same deal. Local gun store had a display on the wall of a tube magazine that had a sympathetic detonation. Don't know if the guy got hurt, but it sure screwed up the gun. Because 45-70 was both the single shot and Winchester's tube magazine, there are two types of 45-70 bullets, both round nose and flat nose. If you are comfortable shooting your rifle with pointed bullets sitting on the primer of the one in front, go for it. You know those ammunition companies are over cautious anyhow, and probably don't have any idea what they are doing.
I'll continue to watch this discussion with interest, because I've never seen such a short .50-caliber bullet, and I want to know what this one is. The poster says he measured it with calipers, so I have to assume it really is a .50 bullet.
When I first looked at this discusssion, and the photo, I saw the "knurled cannelure" (tiny parallel ridges inside a bullet's body-groove), and knew the bullet had to be from no earlier than 1877. I thought it might be a .50-70, so I went looking for potos of 19th-Century .50-70 bullets. Turns out the .50-70 (and presumably the .50-90) bullets are longer than the poster's bullet. See the photo below, showing a .50-70 Government bulletmold, marked by the manufacturer, "Winchester 1880."
I'll continue to watch this discussion with interest, because I've never seen such a short .50-caliber bullet, and I want to know what this one is. The poster says he measured it with calipers, so I have to assume it really is a .50 bullet.