Dreyse had 2x hgiher rate of fire than rifled musket but shorter range and acecuracy. Austrian unit which officers were trained in new pattern tactics (favouring long range firefights over column assults) held back and repulsed prussians on their fronts.
Overall it can be said Prussians won battles my marching not on the battlefield. In france they suffered higher casulties in most of battles but they outmanouvered enemies and it was they key to succes.