Put tactile references on the mags. Or use only metal for one and plastic (P-Mags) for the other. Or only have out what you need to load. If the .300 is out, don't have 5.56/.223 in reach and vice versa.
Yeah, that’s what you’d have to do... then just be real careful.
I have been woken up by my phone and been trying to turn off the alarm clock before.
Of course after you had burned through 31 you would likely be at a pretty high state of awareness! XD XD