I think this are very common round nose lead bullets

Georg Koch in his book " Die Jagdgewéhre der Gegenwart" - the hunting rifles of the present age /1891
shows this hollow point bullet for the Randschlusspatrone

btw, Koch was the son in law of Franz von Dreyse

he write the hollow point is for making this big bullet lighter for giving it a better trajectory. because of the increased recoil and the sharp rifling necessary in the short "Rotationsstück" it was not possible to load more powder than 10:1 meaning 1 gramm blackpowder for 10 gramm bullet weight.
but remeber this:

this was common in this time, look at the 24 ga combination gun shooting the 21,9gramm with 2,5 gramm
blackpowder.they never shoot more than 80 meter on game, there was allways a Schweißhund and hunting was the to follow and find the game.

this is a 0,70" bullet cartridge sold in an auction here for 167 euro - they are very rare

case lenght is given as 35mm

http://www.munitionsauktion.de/browse.php?cat_id=1