Firecrackers - Oven vs. Microwave - any difference in the high?

I am making firecrackers for the first time today. Using about 1 gram, I think.

I'd prefer doing it the microwave way but wondering for those of you have tried both ways is there a difference in the high between micro and oven cooking?

I've heard of the peanut butter dripping out the sides so to insulate I think I am going to take little strips or pieces of graham cracker and cover the sides.

Advice welcome! I'll be sure to post my experience during or afterwards.