Daryl, its not easy to visualise the Doersch & von Baumgarten rifle but be aware this is a common bolt action. you release the main spring than open the bolt like any other and load a paper cartridge. before firing you cock the action by hand so its a modern "safety rifle".
another hunting rifle of the same model I know was later rechambered for the 9,5x47R only be rebore the chamber and change the needle against a firing pin.

Doersch was working for Dreyse before he was going to Suhl to become a master gunmaker there and work on his own. iirc, his bolt action design originated from 1859/60.

http://www.littlegun.info/arme%20allemande/artisan%20c%20d/a%20doersch%20et%20baumgarten%20gb.htm

and here

https://forums.gunboards.com/showthread.php?169793-Needle-Rifles&p=9370707&styleid=7