I agree with Monty. #2 is most likely a 45/70. As he stated, that doesn't say much, as the 45/70 was (is) loaded from about 1870 to the present. A micrometer reading of base diameter would help. Also, a weight in grains would assist. Bullet dia. for 45/70 (fired) should be .457/.458, weight should fall between 300 and 500 grains, assuming no lead loss due to impact. As for the first one...you got me there. There were some two part bullets made by swaging a hard lead base onto a soft lead nose. The base looked quite similar to yours, with the "teat" connecting to a hollow in the nose portion. However it would seem that with your piece the complete bullet would be inordinately long when swaged together. Other than that, it bears no resemblance to any bullet I have ever seen. Interesting!!
Elee