From the pictures, it appears the magazine followers are shaped to the shoudler, thus the shoulder and not the bullet's nose is the guiding factor, thus spitzers should work just fine.
It would be VERY easy to seat 5 spitzers at the proper length and try them for feeding. No doubt different guns may feed differently with the same projectiles. Better to test than to simply use 'printed' text. Oft times, written text is incorrect. Doing proves it one way or the other.

Simply done and the FINIS!