No, that is why the 'ring' was added to 'High Velocity' Schönauer magazines. On other 'prewar' models the shoulder and nose must fit, as the MS proprietary cartridge is closely fitted to the space between the spool and the magazine's machined lower housing. There is nothing to prevent a round with an undersized 'profile' from wandering astray. Excessive side clearance or a projectile too short will allow the nose end of the cartridge to fall into a void and jam. It will happen consistently on the third round while feeding and they will not cycle. An oversized round simply would not fit.

I have tried other reloads with semi spitzer loaded to standard overall length that were just a tad narrower at the top third of the projectile and they jammed. Hornady 3715 (seated to original Eley specs.) always works flawlessly.

Kuduae has apparently done the trial and error and has found a seating depth for some particular bullets that are a workable compromise.