While the fire piston can ignite a variety of natural tinders, not all of these are convenient to handle. For example, it is quite possible to ignite rotten wood punk. ( This can somtimes be a challenging tinder to use as it is more stubborn and usually requires 2 - 3 attempts before lighting.
Wood punk:
However I feel it is worthwhile to mention it because it is so easily obtained and its good to have options in the bush. )
Punk prior to ignition
Once lit it is difficult to extract the coal from the cavity in the piston shaft as it has a great tendency to fragment.
Therefore, I suggest that you dont pick it out at all. Rather use the coal to ignite a larger piece of punk. Three walnut sized pieces of punk placed in contact with one another can be blown into flame without need of a fiber nest.
Wood punk:
However I feel it is worthwhile to mention it because it is so easily obtained and its good to have options in the bush. )
Punk prior to ignition
Once lit it is difficult to extract the coal from the cavity in the piston shaft as it has a great tendency to fragment.
Therefore, I suggest that you dont pick it out at all. Rather use the coal to ignite a larger piece of punk. Three walnut sized pieces of punk placed in contact with one another can be blown into flame without need of a fiber nest.