It is not what your intent is. It is what they think your intent may be! I would say that if it is safe, you think it's legal, on your own property, doesn't draw attention, and is not recorded, you will probably be ok. If you annoy your neighbors don't do it. If it isn't on your property don't do it. Don't let anyone record your shenanigans. Definitely don't do it if there is any chance of hunting someone or damaging someone elses property.
I may sound like a safety sally, but if you have to ask, you probably already know the official answer. You just want someone to tell you what you want to hear, not what they should tell you.
If you own a 5000 acre ranch in the desert, go ahead and find out what a 20lb jug of tannerite does to a ford bronco. If you live on a 1/4 acre with neighbors don't set off a 7lb smoke bomb. Use common sense.