Thank you for your comments! Sorry about the scattered thoughts. I was in too much hurry. I have been experimenting with a paper "sabot" that I designed for my muzzleloading rifle. I am looking for someone with experience or knowledge in the desgn for a process that seems to have died out. In the earlier to middle 1800's all long range target shooters used a bullet that was cast smaller than the final dimensions, and then placed in a simple die that , yes, supported the nose profile. the bullet was followed by a punch that had the base shape turned onto the end. The bullet was shaped to the final dimensions by striking the punch with a hammer a "certain number" of blows. The bullets so worked were then all exactly like each other, same nose, same diameter, same base prifile, etc. The bullets made this way did not have the grooves to hold the lubericants, so they were designed to be about 1/2 the rifling depth over the bore diameter, and a high grade of "oiled" paper was placed in "2 strip" or cross shape (some used linen patches or 3 strip paper patches) over a special fitted false muzzle, the bullet was pushed into the aligning false muzzle, and a starter rod was used to push the bullet and the paper patch about 4-5" down into the bore of the rifle. The most accurate of these rifles were amazingly accurate at very long ranges to 1,000 yards. I have seen representative targets from that day with up to 50 shot groupings, that made a ragged hole in the center of the target, from unbelieveable ranges, though the most common range was "40 rods" or about 220 yds. The earliest of these had a very short bearing surface that was easily tipped if the bullets were not started correctly, and the later versions had a much longer bearing surface and of course a better S.D. that made for even more long range accuracy. The "boattail" design was developed in the later 1840's.
Many of the bullets were of two piece design (similar to your soft point idea) and the two piecees of each bullet were actually swaged together in the swage die unlike the welding that you would see in the softpoint design that you have developed.
This is a very short description of the bullet making process that was developed then, and leaves out a great amount of detail. (or this would become a book)
I saw the neat softpoint idea that you have here, and I hoped that maybe someone had some dimensional detail of the bullets that were made to be swaged back then. I have seen the shapes, and there were about as many as there were shooters.
The muzzleloaders today use those plastic high pressure sabots to align their under sized bullets in the modern muzzleloading rifles. I shoot muzzleloaders and I want to design a cast - maybe swaged bullet that I could use with the paper sabot that I have designed. I have had some fair results so far, but not the consistancy that is needed to call it a success.
Sorry about the long post, but the short version that i made yesterday presupposed that there might be someone reading your excellent forum that was knowledgeable about the process. I believe that I will have the best possible chance to come up with a suitable design from your site, and having discovered this venue, I was a bit over excited.
The bevel base would best mate up "as cast " in a plastic sabot that has a radius in the bottom of the slitted cup.