Yes, the DL-301 is a low output(0.3mv) moving coil cartridge, and yes a moving magnet cartridge would have much higher output.
However, I don't think that many moving magnet cartridges are going to match the nice sound of that DL-301.
While some may argue, a good low output MC cartridge has lighter moving mass, and therefore will be quicker to respond, and better in the high freq's than MM cartridges which have heavier moving mass.
The lower the output that an MC cartridge has, the lighter moving mass, due to the fewer coils used. Most of the best moving coil cartridges are low output. Low moving mass is not everything, but it does mean something.
It sounds to me like you could probably use a step-up device in your phono to bring enough gain for that cartridge.