"You need something that pushes apart, a slow burn,"
OK, I'll try some black powder, but I really thought black powder burns extremely fast. I just fear that the tough wood will not yield without destroying a good bit of it. That nipack gave it quite a jolt, but the log took it on the chin and remains intact. For a 40 inch lob with very tight grain is the recommendation still about one cup (1/2 lb.) and a bored cut right to the center? Someone mentioned putting the powder in a Sammy bag. BTW, what is a Sammy bag? Will any kind of container work even like a ziploc bag for instance?