Hey all, I'm new to the MP5 platform and have a potentially dumb question... Is there a reason why you shouldn't load a fully loaded magazine in an MP5 while the bolt is closed (i.e. cruiser ready). I'd like to be able to throw my SP5K in the car with a loaded mag, bolt closed. Just want to make sure there is not a legitimate reason not to. All videos and manuals show loading it with bolt open and slapping the bolt closed. Don't get me wrong, thats bad a$$ as f**k!