The new design came about because as a new shooter I couldn't understand the need for a different mechanism in bolt actions to use a rimfire cartridge. In a lever action, or a revolver, or basically any other type of firearm the only difference was the size and position of the firing pin. I also thought that most rimfire rifles were ugly compared to centrefires and that if I could come up with a mechanism that could be either, and wasn't complicated, , then I would pursue it.
For comparison here is a pic of by bolt in the centre with a 22mag. Top is a CZ527 in 223 and bottom is a Walther in 22lr. The scale difference is obvious.