I salute those that can use Mg, but I haven't had much luck. Furthermore for he size and weight of the mag chunk I could carry something else that I know will work for me. A 4g ESBIT tablet is one of my favorites. I have a chamber vacuum machine and seal them in tiny red mylar bags, perfect for survival use. They never expire or spoil, they don't absorb water and will burn when wet. They're also easy to light (with flame or a spark if you shave them as you would fatwood or mg).